Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b121ebe93e1a08a…

MALICIOUS

PDF

66.0 KB Created: 2021-02-02 03:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: e37e4f65fe65bf3cd1dd4646b7514354 SHA-1: 51713f05221c367625779b721e10965198d4aaf1 SHA-256: 7b121ebe93e1a08a81395c34d0000307e86ad9a960f4d6e9271cadd09920705c
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/123?utm_term=diffusion+and+osmosis+problem+set+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414173/normal_600b388f8a135.pdfIn PDF document text
    • https://cdn.sqhk.co/dowotovewi/hhgh39L/new_english_song_full_hd_video_download.pdfIn PDF document text
    • http://mon-fortuneo.best/pagamorijek10yxn.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/jebgdxb/tanglefree_goose_decoy_bag.pdfIn PDF document text
    • https://cdn.sqhk.co/lefidotoxono/giRchfq/99217492024.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/rCkWpjh/idle_factory_tycoon_hack_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vugujebeku/bfehjab/75330518946.pdfIn PDF document text
    • http://winnerslm.space/jopizx13o0.pdfIn PDF document text
    • http://vvinorama.fun/taxeropevorinetepoz9xdn.pdfIn PDF document text
    • http://santecmb-sarl.com/photo_editing_software_for_android_mobilejtzg1.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxogatuv/jsjahiH/suzupix.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/eZijeZV/dragon_hunter_lance_vorkath_osrs.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/newajod_niwivib_zopafaxezis_jakoki.pdfIn PDF document text
    • http://it50life.pro/27865005677p4539.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384633/normal_60081f1088c17.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_off0000c47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC47C 5420 bytes
SHA-256: 23ecdd3603deeb9dc7c26524bc210a8658945a195daea3021267a08bdb17d29a
font_01_sfnt_off0000d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E5 10480 bytes
SHA-256: f726e4cf5e20e943d66d3454170050f8cba4ba755a1933afe1c968fe3b730cdc