Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5ee395ab289006…

MALICIOUS

PDF

78.1 KB Created: 2021-03-18 08:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 774aa548e231fed1ce789b0a23cefcd5 SHA-1: 9c2debe3316a01bd8511f1a502a3a8380c618f0b SHA-256: fb5ee395ab289006c2fef91c5522fd3a6bbca111bdb3da31358bb9dc3ab4b534
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 0.9993

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://seumenha.ru/award?keyword=century+ply+laminates+catalogue+pdf PDF link annotation
    • http://nakalabaxis.mywebcommunity.org/asphalt_road_construction.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/dusilujixo.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/16366952486.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/srimad_devi_bhagavatam_in_tamil.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/two_step_equations_with_variables_on_both_sides.pdfIn PDF document text
    • http://jujavekerubeko.scienceontheweb.net/hippocrates_aphorisms.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/wajowu.pdfIn PDF document text
    • https://sirukume.weebly.com/uploads/1/3/0/8/130814715/de36069f5.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/1e448.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_90bcc719dcf54e9abd3a936c35beebc7.pdf?index=trueIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_fc5e63f7367645aa8069baa5335e28c5.pdf?index=trueIn PDF document text
    • http://tizeruxabono.onlinewebshop.net/51408668030.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/jalolojov.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/43310121316.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/how_much_is_david_beckham_worth_in_pounds.pdfIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_1f7da898502c465cbd7817700fc30b3c.pdf?index=trueIn PDF document text
    • http://gefilodeza.myartsonline.com/86465642216.pdfIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_c827ca37d2354713b6a091462115fde4.pdf?index=trueIn PDF document text
    • http://roveramo.atwebpages.com/63743372557.pdfIn PDF document text
    • http://wumugajus.onlinewebshop.net/wd_my_cloud_old_firmware_download.pdfIn PDF document text
    • http://dowafirowelumex.atwebpages.com/grade_7_math_final_exam.pdfIn PDF document text
    • http://dexadusoxeb.atwebpages.com/nupowaratasodakem.pdfIn PDF document text
    • http://gofumakexoj.onlinewebshop.net/95492279880.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_off0000f34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 5484 bytes
SHA-256: 41268f3393b9f79b67716e02fde4279b097ecc5c0784de89a0d9a88e1ea8f9d5
font_01_sfnt_off000105e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E5 10976 bytes
SHA-256: f865cb6151413182c472a1d8638a3b2daff46dcd8877eb677e0b5befa4467c82

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