Malicious PDF — malware analysis report

Static analysis result for SHA-256 c87ab285112922d7…

MALICIOUS

PDF

69.3 KB Created: 2021-02-15 16:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c4cbe74154f3912bb1683f463be2a175 SHA-1: 5257f5f2c90f62016c393fb3af624f5a8b356a82 SHA-256: c87ab285112922d7fada3a23fdb448fdd6c6e27aaf89b08260897c3bc4cb301a
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://leonvi.ru/wb?keyword=rebel%20xti%20dslr PDF link annotation
    • http://hugertely.xyz/zusetoevz3i.pdfIn PDF document text
    • http://kojibataruv.iblogger.org/95165543103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466151/normal_6000539de3a9d.pdfIn PDF document text
    • http://dresdenpharma.ru/human_skull_anatomy_activity_answer_keytoj5n.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/e8gjBX1/tower_defense_unblocked_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/xakatikakizi/ihiiai2/82671246283.pdfIn PDF document text
    • http://myfirstsite.xyz/lagan_lagi_more_piya_video_songeocmf.pdfIn PDF document text
    • http://taher-tcac.com/dynasty_warriors_9_ps4_gamej53e7.pdfIn PDF document text
    • http://phrensy.co/wedaxeliga51ei6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455176/normal_600f16c98696e.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/igsFhjo/tangled_the_series_rapunzel_hair_turns_black.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428069/normal_6027b104414c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodezolejew.epizy.com/rapuxanafuwiwifegozep.pdfIn PDF document text
    • http://ruxatavebokoj.epizy.com/77472654794.pdfIn PDF document text
    • http://tivekanudoz.rf.gd/assembler_deux_mac.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_off0000d557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD557 4824 bytes
SHA-256: 448e33c58e34f0371b7528ef0dfec94bf312b8cc1c002f6b6c2e73a3cfd098e1
font_01_sfnt_off0000e5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D2 10272 bytes
SHA-256: 112fe0512eb37794a128c3aa0d86c42c1611ca16223890c82d79572f215eef22