Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3977d9d53b6a864…

MALICIOUS

PDF

73.1 KB Created: 2021-02-20 11:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 26f2356864e22674332559b200b92177 SHA-1: d55d6d4750c24ad7dcfe5126185f1fa5788d01fa SHA-256: f3977d9d53b6a8644a770940f4dc69d1990299c1b626a3a675fb822de12c4682
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=review%20fender%20super%20champ%20x2 In PDF document text
    • http://autobuff.xyz/950962021xlhdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372080/normal_5fe2cc9f924c0.pdfIn PDF document text
    • http://kupivse.xyz/dimukisusovazcxkpq.pdfIn PDF document text
    • https://xibomuwupipufa.weebly.com/uploads/1/3/5/3/135389044/83ee60e5.pdfIn PDF document text
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/8512175.pdfIn PDF document text
    • https://lorebanoga.weebly.com/uploads/1/3/0/7/130738704/1986760.pdfIn PDF document text
    • https://vilujelirajoki.weebly.com/uploads/1/3/4/3/134378771/89598c63aa6fbc.pdfIn PDF document text
    • http://phtech.site/carnival_games_ps4_review_2018kj6gf.pdfIn PDF document text
    • http://teasmall.space/liz_in_september_online_full_movie0uku3.pdfIn PDF document text
    • http://shop-profildoors.ru/nocrop_photo_editor_square_pic_square_fittert9rgb.pdfIn PDF document text
    • http://promoocaoameericanas.com/622000736472olzm.pdfIn PDF document text
    • https://zolivapodi.weebly.com/uploads/1/3/5/3/135313307/zojumo.pdfIn PDF document text
    • https://peruvapi.weebly.com/uploads/1/3/0/8/130813059/tisazezapigekun.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/kuxuxemu/jizotoxagudedugunolegus.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/minority_report_2002_parents_guide.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_off0000e05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05C 5720 bytes
SHA-256: 5795fba22449c72fe35c3013ba2ffa8189286c341be0d5448594aeb64b92bc59
font_01_sfnt_off0000f3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C8 10476 bytes
SHA-256: bcf03eb36ad4d89bf7119c0915d5e0c6cec2a6e683fcb1160a93448124c1ec3b