Malicious PDF — malware analysis report

Static analysis result for SHA-256 e698298c9d97981e…

MALICIOUS

PDF

91.2 KB Created: 2021-07-23 01:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 83dcd4c438b41a8ca09ddf20ea3613c8 SHA-1: 0a206068b1568410d38b2971b454bb60da95eda8 SHA-256: e698298c9d97981e28d20d04bcf8743454872734f76d6df4442f2e00c49a9450
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads and disposable hosting domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 6

  • 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.
  • 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://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/1g3acqtgork45ttvtpjthcv2d1/85648180742.pdf In PDF document text
    • https://peterdegendt.be/file/88800949132.pdfIn PDF document text
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/92145154295.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c089fb8e357---43554919737.pdfIn PDF document text
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/movadogifuse.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecd7e68370---26099094286.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/3345072954.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/5b1577c3349c77f35c68e048698e192c/13759522029.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/3647533130.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082264764de2---89034249660.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b095545ad1---nixunirobefibuzap.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/edd4fe6338836a56a62b6e73f71a4e5b/97629996573.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/7dd336ec315fc5ace0883cd46bd5221d/zosobisusitaxi.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/tenufe.pdfIn PDF document text
    • https://iwistw.com/upload/files/62773040428.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/24487135087.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/rexejumudowazutiwikofijez.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099169b71923---momitizipozizupikixev.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/jezotokawiri.pdfIn PDF document text
    • http://klefmarken.se/upload/file/51373344057.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/jomiwurunolosilojubegufip.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/worufepujemezogowebosuni.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/5rfvkqqb5buusoqd1eq37p6kkn/63073389436.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702599a0217---xakuf.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a95e82421c5---gubaxalunifukopun.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/8608277555.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=what+information+would+you+find+on+a+physical+mapPDF 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_off0000ff37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 17012 bytes
SHA-256: 6bad91acca4a4004b5b14b45a8e076844eab6c11410356eada0d331e74d554a1
font_01_sfnt_off00012b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000143b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B5 11048 bytes
SHA-256: 4874c21bd67c41ef89bcd0d7c775bc5d2de542f3346547f6b85295edb9c60859