Malicious PDF — malware analysis report

Static analysis result for SHA-256 753f944cdba5dd4c…

MALICIOUS

PDF

68.3 KB Created: 2021-03-02 04:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 58fa9a17af858bcb35a7eccb2d7d518b SHA-1: 8bed6c87d10c835c2e05eb1b359b4bad9087af44 SHA-256: 753f944cdba5dd4c1019c514cfffe84307f4f2e3f1a7fd6d939f84fdb80632e7
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/award?keyword=port+greek+latin+roots PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393759/normal_5ff78d8d869d5.pdfIn PDF document text
    • https://gejilesiwurulu.weebly.com/uploads/1/3/4/3/134374779/4237775.pdfIn PDF document text
    • https://rajopolaxobi.weebly.com/uploads/1/3/1/4/131406270/vatoz.pdfIn PDF document text
    • https://godivibodo.weebly.com/uploads/1/3/4/0/134040440/xanud.pdfIn PDF document text
    • http://bigops.fun/68982925474lhxjt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_602aa563bf2dc.pdfIn PDF document text
    • http://italywow.info/rijaxor3hr0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_601cb433a8f70.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/hgoggRp/ufc_tonight_main_card.pdfIn PDF document text
    • https://vomudata.weebly.com/uploads/1/3/2/7/132740307/kujifuboras.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/lobenumavurew.pdfIn PDF document text
    • http://smartcoin.design/werudndmtw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5fea3e0b8da86.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/e7ihfhh/wings_of_fire_wiki_fanon.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/vudivuzakal/what_type_of_animal_is_bagheera_in_the_jungle_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/16747756058.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/entropia_universe_mining_guide_2019.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_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 4920 bytes
SHA-256: 01dd7203e0d2c7ca0708f1ac46489a1f2bc9144c062507c08b9582430e484d44
font_01_sfnt_off0000e087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE087 10348 bytes
SHA-256: 1da3744996125e31116de63955a27263b2850fa86fb4b1506cfa48e5b54e01bb