Malicious PDF — malware analysis report

Static analysis result for SHA-256 1439869495578421…

MALICIOUS

PDF

78.1 KB Created: 2021-03-16 18:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c39f040e84337c015e45c96264241975 SHA-1: 9483074caddfed7949b514c342d23f973223e13c SHA-256: 143986949557842119b1c648badd8c5e5b76879d172b674d2309f733be5bb8a2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://jumiwimov.ru/123?utm_term=uniform+circular+motion+and+centripetal+force+lab PDF link annotation
    • http://kivexuvuripamo.iblogger.org/18672774991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489734/normal_601fc821545dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5ffa8cac22da3.pdfIn PDF document text
    • http://temppicture.xyz/wilunejavavuvifodixokereq6qac.pdfIn PDF document text
    • http://megantv.site/history_of_ancient_egypt_documentaryt5p8k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372360/normal_6038b7f2336f4.pdfIn PDF document text
    • http://my-favshopc.online/quicken_print_optionsn2x7r.pdfIn PDF document text
    • http://rekusigixebisuk.22web.org/dosisofizigobi.pdfIn PDF document text
    • http://glawerry.online/60527900872n0hhx.pdfIn PDF document text
    • http://youtube-subscribes.com/xezesixamorapivoriv46uwg.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/zaxawetawupo/33660980292.pdfIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_68d7a201768749dd9f61bca8fe6a1c9f.pdf?index=trueIn PDF document text
    • http://wosakev.epizy.com/semicolons_and_colons_worksheet.pdfIn PDF document text
    • https://0c7b1e5d-10e9-4c66-9a64-57e6babc74f3.filesusr.com/ugd/6b59ba_70dccaff7675478d9c9e0fc7f48dc67c.pdf?index=trueIn PDF document text
    • http://kelirifexobuw.rf.gd/35782426367.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/72998565824.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/bifulekukelun.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_aaeab87c300948019be5a6c776274893.pdf?index=trueIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_9b1514adbd2345f3930f8cc09d684f0d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/free_rent_receipt_template_india.pdfIn PDF document text
    • http://tidomag.epizy.com/my._mail._ru_video.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_910fbf87709c41d18cd37e2fa4cc46be.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 5252 bytes
SHA-256: cf92e35d689f403572032a105637e2b16fcfaa246ebb9336387618f9209c2e1d
font_01_sfnt_off00010204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 11972 bytes
SHA-256: bf33d9f4921c74c201b691141b23f6b1e137b9bcea9370c975faf5e0d9f6b934

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