Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3df0d196e5b662…

MALICIOUS

PDF

80.5 KB Created: 2021-04-09 14:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7124183fb0702eb99186fdd6cecff939 SHA-1: 2ec107d67086df7177aafbb409bacc77ca3abf2f SHA-256: 0c3df0d196e5b6626b6c48f3fe6867dc300ea6b473524923dcd125033d73269c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/strik?utm_term=epson+workforce+600+paper+jam+fix PDF link annotation
    • https://cdn.sqhk.co/bumogebiz/gzAifih/scruff_app_jobs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_60138a8aade2b.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/gdiaght/matonuwepiw.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/jbRQjg8/rapunzel_dress_up_games_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/kofelejezem/jb5hghi/59863595448.pdfIn PDF document text
    • http://xakerof.22web.org/79040072942.pdfIn PDF document text
    • http://demejizato.22web.org/17405458902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5fffaf6b37d50.pdfIn PDF document text
    • https://cdn.sqhk.co/lobitukojuro/ghFx1hw/87621100675.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/ggjbprc/the_chrysalids_book_report.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/hfhgyii/kolibri_nano_drone_two_dots_istruzioni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5fea4484d7bc4.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/hgjhhhi/tattoo_maker_machine_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483608/normal_600cbe36b0819.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/gdjaQhf/princess_costumes_for_adults_cheap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wilurimidolajej.rf.gd/bladder_training_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/87796129394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855a8ddb-d472-4f40-a918-7cc42f2a7287/voridemomalitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feaba8cc-aa7b-4607-96dc-4aba38f6f459/bezavugagapalanisabo.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/canon_mp240_e16_error_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07f3ada-7805-453d-a3c4-aa1e03a8521a/how_to_learn_marketing_management.pdfIn PDF document text
    • http://luvojidepezepag.epizy.com/62068717076.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
    • 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_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 5680 bytes
SHA-256: a843a8dd06f298701b26e055323d89ecae5e983a09b71be38a0972658c07ef74
font_01_sfnt_off0000fa12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 10868 bytes
SHA-256: b580be01a75e01569d499cb73e2a008610deb352b38b8b38e62b75ecad1a0cb3
font_02_sfnt_off00011f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F67 16084 bytes
SHA-256: ce90dcb8f80a691a226d66d7b9fb40db13b52946125f6d312f8860abae454107

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