Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab227a2d89b4bca1…

MALICIOUS

PDF

91.8 KB Created: 2021-02-12 12:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6fde7bd8ba7f75c60e3894a1cb5c374b SHA-1: 8fa5f72df0047b7b80c2cca8dd899004ed18948d SHA-256: ab227a2d89b4bca1f7eae4365b54289b22cf102cbcbeff0f7a7e26d0f84b9cae
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=skytech+m62+manual+pdf PDF link annotation
    • http://nigasheff.xyz/receitas_de_caipirinhabrnr9.pdfIn PDF document text
    • https://tejojapifofomo.weebly.com/uploads/1/3/4/3/134339563/sigifadorawom-zaxaravizevimer-natibo-bafaboj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491412/normal_5fed1b4d070d0.pdfIn PDF document text
    • http://cmb-societe.com/learn_thai_free_downloadfwhu0.pdfIn PDF document text
    • http://kawlites.online/jonusexunesilapakuzy8fmu.pdfIn PDF document text
    • https://gafapelisepofas.weebly.com/uploads/1/3/4/7/134762307/796e08ecc53c68f.pdfIn PDF document text
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/8d82b5.pdfIn PDF document text
    • http://ourfanz.com/american_video_gamem2h31.pdfIn PDF document text
    • http://santecmb-sarl.com/nowivuveruvogixelefizulaykxq.pdfIn PDF document text
    • https://borerejo.weebly.com/uploads/1/3/4/0/134040615/dosakukosumipo.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/fdIifgf/sonic_the_hedgehog_2_full_movie.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/zevija.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/lopadivupudexa/iobit_driver_booster_5._5.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/delavan_nozzle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/kowenanumotavogifuxos.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/icd_guidelines_for_hocm.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
    • 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_off00010ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF8 5676 bytes
SHA-256: 94a50ebd92691131939290ed8e9582584175c139eb6d20fcbcfac4717bb5ca2d
font_01_sfnt_off0001223a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223A 13764 bytes
SHA-256: 4869c3d7ea207854ff8edd5fcbd47a2cdec04730659c4dc185b5efde32459d4b
font_02_sfnt_off00014c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C6A 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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