Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a016094b623e6fa…

MALICIOUS

PDF

114.5 KB Created: 2021-01-06 11:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3bdf53ff22eaf1e8e4d3fd0d9d272475 SHA-1: ed7df13b4cba72667b17c24ed7ea55cf10d1e5cb SHA-256: 6a016094b623e6fab1fbc37c8c799aa6cb2a34342bfab8416e243cc1e5b8645d
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a link farm, containing numerous external links to various domains, many of which are hosted on disposable platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a 'calendar' lure in the document body, combined with the mass of external links, suggests an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffset.ru/123?utm_term=alternate+side+parking+calendar+nyc+2018 PDF link annotation
    • https://cdn.sqhk.co/kuxaroposa/hehdjcU/34456753096.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/LKhjifx/96868839461.pdfIn PDF document text
    • https://cdn.sqhk.co/rogokivika/fejhmhj/range_rover_classic_off_road_accessories.pdfIn PDF document text
    • https://wenutezow.weebly.com/uploads/1/3/5/4/135400756/kowajenemazij.pdfIn PDF document text
    • https://puzagejezazi.weebly.com/uploads/1/3/4/4/134465952/5082004.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/f13788e9dd55d6.pdfIn PDF document text
    • https://domuzowejiro.weebly.com/uploads/1/3/4/3/134360268/5298892.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/f74559.pdfIn PDF document text
    • https://cdn.sqhk.co/berovanova/CF1iax6/xemepefutoje.pdfIn PDF document text
    • https://jelopujepifo.weebly.com/uploads/1/3/4/3/134341958/d27f42aa8c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496828/normal_5fe2ef64d71b3.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/jdnhhhh/music_racer__ios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0b2f12-6d2d-4700-9a02-228a4d69939f/lakotekivefewixov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b614bc-7e18-42bb-9d91-35a60bf38b3a/73026401530.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17474 3040 bytes
SHA-256: b76b0c952f6e654dd407da31e7b80a36d4e40938a7378cbf64c778fea251f4bb
font_01_sfnt_off00017f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F57 5916 bytes
SHA-256: 1807de03cdb3d8324b74a0a10da15d95c91956cd4b7019b80e64bb478bbd43ea
font_02_sfnt_off00019399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19399 12132 bytes
SHA-256: a050ce2dc32a53e4c9310e42f7d6174679def75559ce1fc96f682a761ba64cea

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