Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89b5cd7aad8d5f7…

MALICIOUS

PDF

78.0 KB Created: 2021-05-23 11:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 029d2ade8a6fb062cd0dca5ea3105803 SHA-1: 8c2edb80547cafbecaac8413278f5dc61fca8839 SHA-256: b89b5cd7aad8d5f76b07291bf08b98e5eec9fa0e89967a7c1499106c9e18283a
156 Risk Score

Malware Insights

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

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 0.9991

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/strik?utm_term=togaf+certification+study+guide+pdf PDF link annotation
    • https://motaxajofepox.weebly.com/uploads/1/3/1/3/131381237/pifugejoz.pdfIn PDF document text
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/4963720.pdfIn PDF document text
    • https://subuletow.weebly.com/uploads/1/3/4/2/134265429/pulatotizakelotigimi.pdfIn PDF document text
    • https://nojijakifon.weebly.com/uploads/1/3/4/0/134012839/gumep_zamujife_nixexarupika.pdfIn PDF document text
    • https://jewukezi.weebly.com/uploads/1/3/0/9/130970006/e71e592ba6a.pdfIn PDF document text
    • https://kewikadovus.weebly.com/uploads/1/3/4/7/134746666/3355377.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/lapebe.pdfIn PDF document text
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/db8e4383f3c.pdfIn PDF document text
    • https://pitalozel.weebly.com/uploads/1/3/1/3/131384414/4852247.pdfIn PDF document text
    • https://rojanudase.weebly.com/uploads/1/3/0/9/130969060/sobumilidedu.pdfIn PDF document text
    • https://tagenomamoz.weebly.com/uploads/1/3/4/4/134476715/35a223d.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/wamatasamegu/dokanidugo.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/how_to_use_splat_bleach.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/python_setuptools_install_dependencies.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/89853750095.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/dotarunubosugi.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/setbackgroundcolor_android_code.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/dart_board_games.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/frmacos_antiulcerosos.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/33132375755.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/raxofo.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/33838448682.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/3053906862.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/fupolepape.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/vufomenikowakopilu.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_off0000f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 5340 bytes
SHA-256: 09cbb42ea8645e26403aa4623fe2eb5cf00aa712bc98a8cce8fbf01f67549490
font_01_sfnt_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 11344 bytes
SHA-256: 8ea967dc30696dca78b4488e50ed8a177e399d9e9498e5ce6878f043ef46647d

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