Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fbffa92806ee7b…

MALICIOUS

PDF

72.3 KB Created: 2021-03-14 10:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 05d0a1e027fb945e6e75a934339fc68a SHA-1: 542fdf52a9209dda9e35c804b663aba09af1c519 SHA-256: 82fbffa92806ee7bc8243767cc9354f10637e3f7075d1f5486d687268f4eff3f
186 Risk Score

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. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely used to redirect users to malicious sites, potentially for phishing or malware distribution.

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://golowaki.ru/wix?keyword=cartoon+network+schedule+2012 PDF link annotation
    • http://normab-id.com/228743141658bn17.pdfIn PDF document text
    • https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/bagoralizobazi.pdfIn PDF document text
    • https://nefipoxitusi.weebly.com/uploads/1/3/0/7/130775115/latijiketud_jarotoxebeval_zudololike_wibisugufez.pdfIn PDF document text
    • https://cdn.sqhk.co/luvuxokam/gbUoyha/dual_universe_release_date_xbox.pdfIn PDF document text
    • http://card2card.live/what_happens_in_the_cruel_princedo2bz.pdfIn PDF document text
    • https://xavimunemu.weebly.com/uploads/1/3/2/8/132815343/8061305.pdfIn PDF document text
    • http://delaem-sami.online/how_much_should_a_32_inch_tv_cost6tglo.pdfIn PDF document text
    • https://cdn.sqhk.co/gabamulijawe/ihhaIig/jurassic_world_alive_hybrids.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/zirigobixixixut_winuziramabuga_foborovebofilut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_b43f83f7ec2e41639b17480d375c4217.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_79ed079a413442668887bbcd88a2c7c5.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_9692b1c86b1147498ff4ec98d10e038d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a069fe-e780-4971-a0eb-310b2f48ceed/tarubebubuvumak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3431d3eb-a23b-4e4f-b380-32140427877a/bigewitovifeloronufafi.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_ce983b3b64634d939afd6bc625c1d665.pdf?index=trueIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_0d562513f1c346b798ef12e4b88235e6.pdf?index=trueIn PDF document text
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_a1499fdbfc184cd1b2837a5f3821c8b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd14bd8-2e08-4dd4-b8a4-76dce4d3ace2/zowulukalulokiw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 5412 bytes
SHA-256: fdc0135c42a8d2fe96af923ba760f1665e70b1786c1d8e012b2df98a9a3bf57b
font_01_sfnt_off0000efe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE4 10580 bytes
SHA-256: ee6a697c97e2d880bf3685864ca33283b7ead21985898dcb9071271122a9cf98

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