Malicious PDF — malware analysis report

Static analysis result for SHA-256 9803b2687bcbcf89…

MALICIOUS

PDF

78.4 KB Created: 2021-03-06 06:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 119ef1fed6f4be76d82e4e7b53ba5d78 SHA-1: 9e0a088c1012fac7eff143609e53fa2048e15bc4 SHA-256: 9803b2687bcbcf89dc9dd5db0e8a0a4d5367c205257467873a3137e6231667e7
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 0.9992

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://dugedepap.ru/123?utm_term=alcatel+one+touch+pixi+4+frp+bypass PDF link annotation
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/mikuwunosanupotig.pdfIn PDF document text
    • http://bluebadge-support.com/bleacher_report_football_fc_barcelonajrq0n.pdfIn PDF document text
    • http://delayikapy.xyz/295591465492ted2.pdfIn PDF document text
    • http://tuimag.ru/28940169716r2a4j.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/automatic_car_parking_system_using_microcontrollerqf69l.pdfIn PDF document text
    • http://store50off.info/2011_nissan_juke_service_manualvyw5m.pdfIn PDF document text
    • https://saduzuwaz.weebly.com/uploads/1/3/4/5/134599146/1191699.pdfIn PDF document text
    • http://craftsmansmetics.com/xotic_sp_compressor_specsn1ksl.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/77e5b.pdfIn PDF document text
    • https://tatefazaseg.weebly.com/uploads/1/3/4/0/134016926/basapakir.pdfIn PDF document text
    • http://rrrrkkkkk.space/nozelaxukofujolaylddc.pdfIn PDF document text
    • https://zidadosivifaju.weebly.com/uploads/1/3/0/7/130775619/xevoberi.pdfIn PDF document text
    • http://phrensy.co/panchatantra_stories_malayalamu6q02.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/tarizirefevifab/39218609613.pdfIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_c45f3957447b4e60b0c611c9519a6287.pdf?index=trueIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_385a86ca1ef946cbb3c460c3570df0b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/37206765921.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_b8b1821f71f2456097d0d98acf3e4060.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/83469591610.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_c789e34141ca43a6b44d3540191d96a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e780199-7ddd-4046-a281-7a637d6ac847/gujamevitukenuxoxomus.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/nikawexiposafasujelufezet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076fca04-775e-48e8-9b85-e75f5c8e01b4/sibutuwatakuli.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_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 5492 bytes
SHA-256: e169142af15bcc0f55fde370612b44f716f60006d95de26d374e24cfe24f3309
font_01_sfnt_off00010630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10630 11436 bytes
SHA-256: 2316348d211102871fde3e8fdf135fae8bbf5d17dd61eacfa3c2d328cc7438fc

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