Malicious PDF — malware analysis report

Static analysis result for SHA-256 802ebff90d8a94b4…

MALICIOUS

PDF

95.1 KB Created: 2021-07-01 00:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f4922b0f61202b5503ca005cd4d4c170 SHA-1: 1969a5321142bc9dce0dc2edcbfb564bb24c38c9 SHA-256: 802ebff90d8a94b482fc128fb6df13f76c844d15d027d2d6d2d8a0cfaf3f2ca4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external links and the nature of the heuristics point towards a T1566.001 (Spearphishing Attachment) initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f96ad2501a---bajosodamati.pdf In PDF document text
    • http://delannahotel.com/user_img/file/kevotagevop.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/3jvmgap4e4jssgm1ugp87ktaf7/fawajarujonatidab.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/omioudgtc8j3v3bm054mfr42g3/susukedoje.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/zawaxowur.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/11788601585.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/22684643216.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/61gjicesiq4cgdq2ts1aac45tr/veresewogedefabaw.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/93927213604.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090874ea91de---wibul.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/u8qb9votr4mp0fc8jh81uc7fo4/64674035331.pdfIn PDF document text
    • http://atrsara.ir/resource/files/2739694256.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/2d1b72c0d27ce4214460d52221ca3208/nezerikum.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a5acb9d01---sazemoxizafedagigedel.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4fd145799---fenepetarinapixupitoniv.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/3b4b515cd51b5b3c84c1e5528961c4ff/91608345312.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/xotim.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/pm7039lmqnga5lrrkb89th0dj7/kipufobor.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/18577533601.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d724fed5d8e---rulibixateparera.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/b249587b6b0fde0b936bea6088b157bc/70099313718.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607035d38cd02---vadebomago.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609f32af32abd---92071568065.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents//files/91724669597.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/senikazapamosiv.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/28566631428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=foreshadowing+the+most+dangerous+gamePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001108f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000128a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A6 10812 bytes
SHA-256: 52bf2bd6f5c96935ba40068bfb9ebc5287d0e8ea4bb98ab78bbf40aa2f37b456
font_02_sfnt_off0001413e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1413E 17524 bytes
SHA-256: 8548bb7ca867ebc4f46118665609a7966406292bcdf0ac1c26ed18434eca99d6

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