Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a7fbc5e978c523…

MALICIOUS

PDF

76.0 KB Created: 2021-02-24 10:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1d64faa096752cb0218d15a6dfe20696 SHA-1: 989d4532a7858cbc242554dcf5a4dbd38ece4a33 SHA-256: 86a7fbc5e978c523b50d2d298151424644336a19bf0b299df797b39294143702
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/wix?keyword=national+science+olympiad+official+website PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464525/normal_5fd8e7cccebda.pdfIn PDF document text
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/6dd42.pdfIn PDF document text
    • http://soldonlakewood.com/venesebifozeraxaz52et2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379616/normal_5febfe6a7e918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_60359a2b02064.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464863/normal_5ff16db3394a1.pdfIn PDF document text
    • http://donbetosstreettacos.com/766551191438uh12.pdfIn PDF document text
    • http://reassurez-moi-fr.info/do_re_mi_lyrics_sound_of_music7c019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_602473fabdbd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468572/normal_60066a9c476d1.pdfIn PDF document text
    • https://tuzutetenufiro.weebly.com/uploads/1/3/4/7/134716615/fosikutajoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_600ea0a29a753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_602651a0af53e.pdfIn PDF document text
    • https://vosuzupitozom.weebly.com/uploads/1/3/5/3/135313705/f8141136b.pdfIn PDF document text
    • https://wovenatoz.weebly.com/uploads/1/3/1/4/131454427/kunetabipojefako.pdfIn PDF document text
    • http://expo-kit.ru/50130736374g06a1.pdfIn PDF document text
    • https://kalepadakib.weebly.com/uploads/1/3/1/6/131637037/zolijixaxapa.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/hjjY8jd/buffalo_drumsticks_in_air_fryer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5508 bytes
SHA-256: 1b5fb64cf09b2c554d092c2d51a96e64239a4d8fec071922ac8b0b5fb98e4f9a
font_01_sfnt_off0000fe50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 10644 bytes
SHA-256: 82bdf0094f4e73baeb161e2b4e8a4c665e7af4c2c6ef822a34350612015676f6

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