Malicious PDF — malware analysis report

Static analysis result for SHA-256 47501e4c6674bafd…

MALICIOUS

PDF

70.6 KB Created: 2021-01-11 03:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5969436e335137202f8a216b7dff35ef SHA-1: e583d542331cddb7669049f90086284b6827cf1d SHA-256: 47501e4c6674bafd4cad30bed69747106a8e0ad2ddfe93d91e0759c51aca2d00
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URLs, including one pointing to 'trafffi.ru', suggests it functions as a lure to external malicious content or phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed to host many links on disposable domains. While no scripts were explicitly extracted, the nature of the findings points towards a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/123?utm_term=the+battle+for+skandia+free+download+pdf PDF link annotation
    • https://site-1173706.mozfiles.com/files/1173706/free_christmas_certificate_templates_for_word.pdfIn PDF document text
    • https://site-1177029.mozfiles.com/files/1177029/highway_to_hell_lyrics_doobie.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/2mqFobo/pocket_watches_for_mens_antique.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5fbb6073b2663.pdfIn PDF document text
    • https://zadisoro.weebly.com/uploads/1/3/4/5/134525292/zusujirubudiragon.pdfIn PDF document text
    • https://cdn.sqhk.co/tomakaxizo/Ulkx6rk/neighbors_federal_credit_union_goodwood.pdfIn PDF document text
    • https://site-1176460.mozfiles.com/files/1176460/terminator_prank_call_soundboard.pdfIn PDF document text
    • https://site-1168485.mozfiles.com/files/1168485/hungry_shark_world_hack_ios_no_human_verification.pdfIn PDF document text
    • https://site-1194964.mozfiles.com/files/1194964/kodewogowuvejovota.pdfIn PDF document text
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/zemesuxilimib-vewotipi-favorepobububid-xegoperebu.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/a37549b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f89723e78829.pdfIn PDF document text
    • https://site-1175201.mozfiles.com/files/1175201/bike_racing_3d_hack_version_apk_download.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/silubebebefuju/the_walking_dead_comics_price_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D4 5372 bytes
SHA-256: 04eb0871bc8f6082e2833399f0cbb401c131b8b3ebd5f0632be7abffd899e696
font_01_sfnt_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 9620 bytes
SHA-256: 8ef3c2f284d565c7717bfb1ac77a4675d6788e74b1387222f804d060880b2510

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