Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31f62f9c9aa676c…

MALICIOUS

PDF

131.0 KB Created: 2021-03-08 01:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 483934897ac775e7be7eb7299f1c6e1b SHA-1: 0c3277fde6938216e631777066ab8d095b52df93 SHA-256: e31f62f9c9aa676ca8e8f7845580524ba514d06b72aa09c2f22b55821d537d5d
166 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous disposable domains, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple unknown URLs strongly indicate this malicious intent. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://botokaw.ru/strik?utm_term=is+cyberpunk+2077 PDF link annotation
    • http://revershjtb.site/fegugasirabaxetudkrh9w.pdfIn PDF document text
    • https://wajajudamivigo.weebly.com/uploads/1/3/4/3/134359543/10d9cbce7311.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379618/normal_5fcaf4aba2fd4.pdfIn PDF document text
    • http://legko.travel/best_100_message_ringtones_for_androidqeygd.pdfIn PDF document text
    • http://amsidgi.xyz/how_to_fish_in_the_ocean_dont_starve_togetherdio05.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/98315219355.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367302/normal_6001f977903fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_6016225618bba.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/18864711550.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/what_is_difference_between_isocost_and_isoquant.pdfIn PDF document text
    • http://lastasked.com/vopowedafamuxovamuk0cubc.pdfIn PDF document text
    • http://punejew.mygamesonline.org/scottish_snare_drum_rudiments.pdfIn PDF document text
    • http://openchambre.xyz/catchers_2_gamecgudb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_5fe901b8c9fe7.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/91820024113.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/gilosunimutejob.pdfIn PDF document text
    • https://vekowafonomi.weebly.com/uploads/1/3/4/6/134692424/9ca33f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471682/normal_5feeb7b266991.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/zuses/android_10_update_for_samsung_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/boomerang_movie_tamil_songs_free.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/piwozodemanibejovu.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/weloza.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/english_to_brazilian_language_converter_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0CC 4788 bytes
SHA-256: 14bc2ead218aafbf45d995fe08e873934e3d2d6c12e75c98d39d86ff8b15ae3d
font_01_sfnt_off0001c182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C182 5284 bytes
SHA-256: a964a5526df57887cbaa3b7a31a5eede7d580aacf0f149003baeb1b76d57d881
font_02_sfnt_off0001d3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3A2 12892 bytes
SHA-256: f8b3c9919f980a0e27d95b070df0f304a83586a2070ffef89079d17cb51ebf19

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