Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f5f6cf267e3a53…

MALICIOUS

PDF

85.7 KB Created: 2021-01-01 14:35:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1a45b44421d9fd2f7aa56457f4fa6cf4 SHA-1: daaf596d74ec0178f2f6370396685097e54bd9f1 SHA-256: b3f5f6cf267e3a53e644f6d2d70967da2029b45ace4cd393510e445e5d984b79
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains text related to 'Galvin green august size guide' and 'wkhtmltopdf', indicating a lure to disguise the malicious intent of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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) documents that carry no urgency or charge/dispute escalation.
  • 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://trafffi.ru/aws?utm_term=galvin+green+august+size+guide PDF link annotation
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/bb61dda6f73a33.pdfIn PDF document text
    • https://wugebanog.weebly.com/uploads/1/3/4/7/134709888/waxazode_raxadow_suposog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5fb86763619fe.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/bivawewavegujoxu.pdfIn PDF document text
    • https://lenimupet.weebly.com/uploads/1/3/4/0/134013040/ff2a916aa3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_5fb5d04b1d545.pdfIn PDF document text
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/povedemotirefira.pdfIn PDF document text
    • https://zuvoxowiton.weebly.com/uploads/1/3/0/8/130813332/025d72.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/778299.pdfIn PDF document text
    • https://zazalefofano.weebly.com/uploads/1/3/4/5/134578352/daweju.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/1741007.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gezizefefififa/solvant_apolaire_formule_chimie.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/36303043177.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_off00010298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10298 4908 bytes
SHA-256: 594af75bcc96fb663b9d0450c2e0c6c96e4633e24861728244a6747dabed6fa5
font_01_sfnt_off00011363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11363 11804 bytes
SHA-256: 0d085279d9307ebb134920e3e9569b2969f87596f6a4d94a4eae7fab4f23d547
font_02_sfnt_off00013b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B96 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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