Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabf94543cc0dbf5…

MALICIOUS

PDF

71.9 KB Created: 2021-09-25 07:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7ed174983e77da205415404e37e04da8 SHA-1: 6b0807fb0951cc3d1acc6d3fc7784e15bc964402 SHA-256: eabf94543cc0dbf51462d46c45e0264fe98155bcdf77997ec7bacaaaa91cde23
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external URLs, many of which appear to be part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading further payloads or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=san+andreas+mod+android PDF link annotation
    • http://homeshopeez.com/uploaded_files/userfiles/files/43766625376.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/nowuwowokuvigijarupeno.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/wobuzafetatamasowexodaj.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/93139550198.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/35367965263.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/pavasowexul.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/28404257562.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/1442639612.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/63370758769.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/xewisoperefij.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/xoxonamijofifur.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/kanobowajinefem.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/futukafabazagogoj.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/55308067486.pdfIn PDF document text
    • http://orthodoxnews.us/file/bufewovepovanigunur.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/dabukedosupebukovoruru.pdfIn PDF document text
    • http://gevenschoenen.nl/ckfinder/userfiles/files/17343057427.pdfIn PDF document text
    • http://twilaw.com/files/files/89624852867.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/xokusutiwanozu.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/taxefixo.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/1281943887.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/vibezufapepunureravo.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/29183589032.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/jozilavagejaroluwow.pdfIn PDF document text
    • https://shaksheer.com/app/webroot/upload/files/dotawivo.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://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_off0000b5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5AB 17580 bytes
SHA-256: 3a94036ad58bbe103c130a5666021275627970ab99da2d97524b439b2ede8b62
font_01_sfnt_off0000e2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 10340 bytes
SHA-256: 7147597a6cbf8b380d3b20561af3a3557ac91ed0a7ba987f00d162c396cae726