Malicious PDF — malware analysis report

Static analysis result for SHA-256 0959b0653dff3eb7…

MALICIOUS

PDF

81.0 KB Created: 2021-09-23 02:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2627d8a7b0250bdf73fa1567cb472d03 SHA-1: 03aa8e426e8dadc6a6030122291afdac2aff0f1e SHA-256: 0959b0653dff3eb70002f84b73e27badb45f55fde8c31a67e7a1da3d42ac6a30
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The PDF structure and the presence of external URIs indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/uplcv?utm_term=miscarriage+after+8+weeks+and+seeing+heartbeat PDF link annotation
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/86i6ve5c87m66dpofi695drq26/2394372669.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/rakadamufi.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/30724494462.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/68823915125.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/29980289241.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/bowupige.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/zemakulenedejanipoti.pdfIn PDF document text
    • http://synphabase.ch/upload/file/34534558501.pdfIn PDF document text
    • https://rheinfurth.de/userfiles/file/34874087570.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/76114512076.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13935247971.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/50398047547.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/595600320.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614115524423b---kegokakidudeg.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/59081051033.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/59257662107.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/nubula.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43621032135.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/93982689900.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/63807494127.pdfIn PDF document text
    • http://minhanh.com/files/54400133969.pdfIn PDF document text
    • https://euroialinsol.ro/userfiles/file/tolexogekowudebadevozi.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/aonraq126fl107f8jq9u8hc280/79276001076.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/juforure.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_off0000d620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD620 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE32 17724 bytes
SHA-256: a4f0cc5789e21d8077c5d3fad8414d808d3d5607547de9543ebc092a73263b38
font_02_sfnt_off00011c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4D 11108 bytes
SHA-256: 9408f305448ed7d6f11f7e3c8600f66487ecab20af39537712f8e2641fcf486a

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