Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55fd677e0fdb8c2…

MALICIOUS

PDF

84.6 KB Created: 2021-01-24 21:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4171e6220dbb02bc5d2c251e14e1a82a SHA-1: bf8920ae8c64f33101a720a4271f22c9f69fc5b2 SHA-256: b55fd677e0fdb8c2eee79096b396694fcc33a02884b7bf82fc009ad9edc6534a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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/aws?utm_term=adhe+kangal+old+songs+free PDF link annotation
    • https://cdn.sqhk.co/metusoteliza/iagiQge/17173185189.pdfIn PDF document text
    • http://airbin.top/95081923082l9mud.pdfIn PDF document text
    • http://wiinorama.website/40339536888fw6o4.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/jiiejfA/accurate_altimeter_free_app.pdfIn PDF document text
    • https://jukamonasob.weebly.com/uploads/1/3/0/7/130740128/vatinunu-lugowa.pdfIn PDF document text
    • http://bilet-pdd.site/qr_code_scanner_iphone_free_downloadcjqno.pdfIn PDF document text
    • https://meliwuka.weebly.com/uploads/1/3/2/7/132740471/9036855.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/LihibLE/ultra_slow_motion_video_software_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416656/normal_5fda39f0b23e0.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/hegghbD/mods_addons_for_mcpe_free_download.pdfIn PDF document text
    • http://fruits-summer.fun/counted_cross_stitch_ornament_patternsnh61y.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/cf0d67c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383471/normal_5fe539d39fc8a.pdfIn PDF document text
    • https://cdn.sqhk.co/simunenij/jhHgeXH/how_do_i_spend_my_apple_id_balance.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417988/normal_5ffa45de01443.pdfIn PDF document text
    • http://itanah.space/sniper_ghost_warrior_3_coop_gameplaynd8sv.pdfIn PDF document text
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/waludop.pdfIn PDF document text
    • https://cdn.sqhk.co/foletesubuf/bhhlMhh/sibosigubajozatotonipumu.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_off000105b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B9 5220 bytes
SHA-256: e632f46f9f64c39d566b1ff644da78d849fa67f960d06e31b3af2013d1c98c19
font_01_sfnt_off00011777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11777 14624 bytes
SHA-256: e5aa03c445c6784f9fcbc81b8f5652dddd9c062a3c00dbe10219542626f28d6c