Malicious PDF — malware analysis report

Static analysis result for SHA-256 222cca43f1cb8fdc…

MALICIOUS

PDF

82.8 KB Created: 2021-03-28 18:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aee2c52845153f43250aa77ad2f3bed1 SHA-1: 3850359941db0f5b954dc2001454a6a74b2ab48f SHA-256: 222cca43f1cb8fdc1734988b090cf9e8313fa2cf61d035cb4156cb7131cae492
186 Risk Score

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 0.9964

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://baarspo.ru/strik?utm_term=what+are+positive+feelings PDF link annotation
    • http://kulofokugizadeb.22web.org/circular_motion_problems.pdfIn PDF document text
    • https://pexerewiku.weebly.com/uploads/1/3/5/3/135313352/xegujodabo_zusowuvako_zuzut_surelenage.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/nupasexasinato.pdfIn PDF document text
    • http://rasazevedip.22web.org/biblia_satanica_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/gdjAgg8/61808314546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5ff9967f25f76.pdfIn PDF document text
    • https://tewawabuse.weebly.com/uploads/1/3/1/4/131437503/7a75a73f.pdfIn PDF document text
    • https://fikijumosoliz.weebly.com/uploads/1/3/5/4/135400707/kukobegokegivuti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fd086c166e43.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/pizza_ontology_tutorial.pdfIn PDF document text
    • https://noxiwojudom.weebly.com/uploads/1/3/4/7/134723323/xulojowede.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/ZjeUT5e/word_scramble_decoder.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/apush_chapter_14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402740/normal_60076e7286f9c.pdfIn PDF document text
    • https://cdn.sqhk.co/bimeniwog/bifjjLS/magujemido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_603d1940bb414.pdfIn PDF document text
    • http://kopatizukuxaluj.scienceontheweb.net/trustworthiness_and_credibility_in_qualitative_research.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/mokefetenunikuxodojatabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_6013643ae71e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/all_of_me_jazz_guitar_tab.pdfIn PDF document text
    • http://jizofaludem.epizy.com/karthika_masam_pooja_vidhanam_in_english.pdfIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_20d8d0b01a9a463095de130bb4e750f1.pdf?index=trueIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_5cb3f9e8b9fc473b97d95f97c715a61d.pdf?index=trueIn PDF document text
    • http://giwuvupajot.epizy.com/kaxuresetinu.pdfIn PDF document text
    • http://gesaneju.rf.gd/resumen_del_libro_el_diario_de_greg_1.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_9a6feb7a690a4a49bd8e20fa9251a15f.pdf?index=trueIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_9d71e59bf56c4450a518a315eff8d436.pdf?index=trueIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_90a34c90a51042b1ba81ff9337515628.pdf?index=trueIn 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_off000105db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DB 5236 bytes
SHA-256: 07c3da312aa442eac5d857008cd270e0119f1c6c68493d26b9ae925d5efc089c
font_01_sfnt_off000117be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BE 10572 bytes
SHA-256: 89174a18b2c1d3982d1871491baaade6e83d196cbe72dc9551ada8f02983239b