Malicious PDF — malware analysis report

Static analysis result for SHA-256 69502c19ce6141f5…

MALICIOUS

PDF

76.5 KB Created: 2021-02-17 06:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 37dd8c213fe48360442e96ffd0985b08 SHA-1: 4eca9a0899dac91125870b1c3f3f9af96ea7a43c SHA-256: 69502c19ce6141f5b2ee209c8d9e86b860ce878b6a2f3702dee9256aa10b56f3
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to 'mortgage broker school nj', which is likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/wix?keyword=mortgage+broker+school+nj PDF link annotation
    • https://cdn.sqhk.co/mareduviger/pgg8iif/can_i_play_bubble_shooter_offline.pdfIn PDF document text
    • https://fuvetowonilup.weebly.com/uploads/1/3/1/3/131383456/biwame_vanilutit_wurikivajesim_gegegel.pdfIn PDF document text
    • https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/potazeviteb.pdfIn PDF document text
    • https://jokiwaxe.weebly.com/uploads/1/3/2/7/132740814/jibavexug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_6028e41cef4ea.pdfIn PDF document text
    • http://5gusevshop.space/battle_bay_forum_deutschndroi.pdfIn PDF document text
    • https://bafuselowazela.weebly.com/uploads/1/3/5/3/135318440/kobunab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_60230f6020432.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/jCtjghf/stickman_ghost_warrior_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/jjeMtgd/foxalutinudunironeroso.pdfIn PDF document text
    • https://pimefukidipobe.weebly.com/uploads/1/3/4/0/134096137/9034604.pdfIn PDF document text
    • https://sizuginoten.weebly.com/uploads/1/3/4/4/134490660/wirosaderixojuporofe.pdfIn PDF document text
    • https://fegopamaxu.weebly.com/uploads/1/3/4/8/134896151/4884568.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/sql_server_2017_linux_developer_edition.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB5 5348 bytes
SHA-256: cfa5fc34eade1b028455838726895810f8c7d31cef391a9aa489b8b8cca4a536
font_01_sfnt_off0000fef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF4 11212 bytes
SHA-256: 87264c21d0b5860a89dcd716c62dc8ae483855d39577e2f99e74cb2656469a94

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