Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9eeebf3b94d7fb7…

MALICIOUS

PDF

85.9 KB Created: 2021-06-27 21:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 06dbb2dad48628f7b07e956d50d1f0a9 SHA-1: 1b1b5fa09d686cea886b59898b197c41a4235a65 SHA-256: e9eeebf3b94d7fb7ec5fe9f5df6d9ae6961ad9559ff2962627da8e57b5f847b9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as a phishing trojan. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting. These links likely serve as a link farm to redirect users to malicious websites, a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=ride+in+a+horse+and+carriage PDF link annotation
    • http://canxetaidientu.com/images/file/badezezelez.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/24135529402.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/0d5d82c3ee9875d93c2c44e7ec60f5fd/66817632399.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/81115458307.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/sedajipurovemokonefevex.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a85679da---lijig.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/lepodipadidutekumesule.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/74602636902.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6da40d377---guxunowepudetizijimu.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/78717403189.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c476eb410d---disufuvesoviwutubidedifib.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a03536f41---vezejatabuvurewajaru.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/bopafela.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/falamesunuxadifok.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/f1364d8889c1c8c55cf94cbc08e90b55/213870089.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b25bdd968---82395520218.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606ddd268e687---jokuzakezaragoz.pdfIn PDF document text
    • https://telenovella-bg.com/files/vuguberokiletupufosow.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924e6eae7c4---18464097835.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf63ac73fc0---63332983189.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210613082342142.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd2b66f0c4---9296953959.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/kijunat.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/b6073502e33d01e9a0118f83520b31e0/foporusema.pdfIn PDF document text
    • 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_off0000ef6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6D 10552 bytes
SHA-256: b30476bc65d3dcc0cd189b1251c206d2bc1d618c47100330625e31029ab8614a
font_01_sfnt_off00010728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 16744 bytes
SHA-256: 01c24d628ce1bcb49386004f69f9979e2490c46fe1dac2e29b92595fd14904d2
font_02_sfnt_off0001325c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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