Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd09191a1e775b2…

MALICIOUS

PDF

72.8 KB Created: 2021-03-16 23:37:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bbc154de4569907c7e5de7d2ba385ac8 SHA-1: 5fee7863b97bf98017fadb4df3c2c7812afb83f5 SHA-256: 6cd09191a1e775b2c80dc08bfa4069399319e07deaabcf1849e1dddc08c35e7b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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.
  • 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/wix?keyword=latin+american+traditional+medicine PDF link annotation
    • https://cdn.sqhk.co/kavejufa/jbhaD4V/heavy_artillery_firework_cake.pdfIn PDF document text
    • http://losinglotterynumbers.com/css_style_button_tagso0l5.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/ibfxgid/94783737485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_5fd75e421a334.pdfIn PDF document text
    • http://podarokinsta.online/jepovidibuxekubda6s7.pdfIn PDF document text
    • https://tawibusosazad.weebly.com/uploads/1/3/4/6/134646708/pudulafoxata.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379984/normal_5fefef98ea4e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470688/normal_6008a4d76079a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471706/normal_6021f78983aa1.pdfIn PDF document text
    • http://1gusevshop.space/bass_booster_bluetooth_speaker_apkj5haj.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/RLheja3/banepojexulizilerof.pdfIn PDF document text
    • https://mowolonob.weebly.com/uploads/1/3/4/8/134874237/0f64b668637.pdfIn PDF document text
    • https://vavetupabon.weebly.com/uploads/1/3/3/9/133999816/nonoloraximefoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/UjbhjhI/jeroxejonupofadawotijul.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/7igtNdL/pipijovafuwonusipalofe.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikifefisu/t5hatie/43392188611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497666/normal_604825eeba5ea.pdfIn PDF document text
    • https://cdn.sqhk.co/wamobuzo/igjcgiZ/ximusewejidesafexaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_603f55e471344.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/powosununenevetodixukex0j2lo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26D 4848 bytes
SHA-256: a57099d03dceda66018cc36cc562dddf701ad7b2f45999a581b88d27a6552e4f
font_01_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 10444 bytes
SHA-256: 07d5d722d9f1fbe8aac2795d481d0b927994f7f179540083b1865576cc53d299

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