Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d29ca9016d1b9e…

MALICIOUS

PDF

77.3 KB Created: 2021-03-14 15:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 70958562476e96df698c5bb7dfa0724d SHA-1: 19917e5f1549ca03b9986540282783951da2d83d SHA-256: b3d29ca9016d1b9ebeb2562c46e2daf61f2a1811930b0ebcf1dcddfbc9a8d49a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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://xezojetit.ru/wix?keyword=lg+sxs+refrigerator+service+manual PDF link annotation
    • http://tijudozi.scienceontheweb.net/zavaxegepogu.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/9gchcji/47088640239.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/agidqxi/pokemon_heart_gold_cheats_r4_file.pdfIn PDF document text
    • http://moresukko.ru/kekejatedimowedoki4426r.pdfIn PDF document text
    • http://lonotel.mygamesonline.org/antifriction_bearings.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/igijmjf/86757288144.pdfIn PDF document text
    • http://perevod24-card2card.site/el_arca_kairel_rule_34_kidxzx9j.pdfIn PDF document text
    • https://cdn.sqhk.co/bedimiwojam/WjeI95P/jumarigixasivowi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/how_to_service_my_air_compressor.pdfIn PDF document text
    • https://394fded3-a37f-45fe-8092-07e0884d2d31.filesusr.com/ugd/bdbc91_7905f48101964f6eadf441a76130f01d.pdf?index=trueIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_3eb5500e34c644f1830561f46bd03f5c.pdf?index=trueIn PDF document text
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_0577f50b8a3143498d00b66a06798964.pdf?index=trueIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_d4d784b768ef488bab446da7e26d0fab.pdf?index=trueIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_8f131210db614eaba615d673de017245.pdf?index=trueIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_737ae3346b1d4c3bb5cd03f7cad58a43.pdf?index=trueIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_a8aeed60e31e427b99182627ce314f52.pdf?index=trueIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_6b6a705202a8453d8043f9bba4595a7d.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_off0000f143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF143 5272 bytes
SHA-256: addfdbfced64d2b3930fcc734b372268e766d303128490b274507371615f8954
font_01_sfnt_off00010331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 10920 bytes
SHA-256: 060131eb86e7e5f8ad82bdc24595a1a9dd61a84fe68f15eb2f2d8fe9f7e0b456

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