Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9754d58e2f44ec…

MALICIOUS

PDF

82.8 KB Created: 2021-04-23 20:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d5c48262d3c6793bd5edec2dd43f58f3 SHA-1: dd6c31716b0f20c734cc58caf8e26f137719aa8e SHA-256: 5a9754d58e2f44ec7f493a31f48dbb8e42c7a5d9e0bfba90ae1d2b661919163b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a large number of generated links. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URLs point to suspicious domains, likely serving as part of a phishing or malware distribution scheme.

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 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.
  • 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/strik?utm_term=boy+scout+roundtable+planning+guide+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409628/normal_5ff98864bd075.pdfIn PDF document text
    • http://mini-camera-super.club/9676489360943i1k.pdfIn PDF document text
    • http://birjand.design/how_to_adjust_pressure_on_a_simpson_pressure_washerqhx4k.pdfIn PDF document text
    • http://homeolimp.com/xowerowefajowababegasax3eclc.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://lordtrans.ru/setadivedatanozipevrmib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_602d7bd632435.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/benuka/84156344538.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/conversation_allemand_franais.pdfIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_d6b4ad38474a4abb9e23345265720a7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/ft_857d_manuale_italiano.pdfIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_be9718e9af5744ecb7c879d211e47a64.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_f9214bb8990148c9b84226e798a8bc59.pdf?index=trueIn PDF document text
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_3c8362e2563143898fc1eb85f3d09b02.pdf?index=trueIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_a8e9a224fab84072bd76b7b6e235487c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/rascals_2011_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/ibn_arabi_love_poems.pdfIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_b424f34d10594123abc149d3a1625a51.pdf?index=trueIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_e17b4a2a0ec14cfb965078e8040ccd3a.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 5808 bytes
SHA-256: dccd13194e483d94e5240af46dc681a0040d57ce19a5e3706fa5108c3e701ac5
font_01_sfnt_off0001011c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011C 11000 bytes
SHA-256: 0b1c999eb6e9dac3d680bb236ffa5c599c2c54f1759f8fa58e3e951acfcd3ce2
font_02_sfnt_off000126ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AD 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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