Malicious PDF — malware analysis report

Static analysis result for SHA-256 8883d55d38aa3255…

MALICIOUS

PDF

65.0 KB Created: 2021-02-16 16:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 855755b032bf1d97996cee52d8b317e1 SHA-1: 0bd09f0bad99d3c871091d4aebe3bef44e0e848e SHA-256: 8883d55d38aa3255ecb0ccd17893745f28fdaeffd1c2f57c6f3d6b1af4476e28
222 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
  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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://crophysi.ru/wb?keyword=martin%20luther In PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/27524347af50.pdfIn PDF document text
    • https://mitigifagoted.weebly.com/uploads/1/3/5/3/135325532/xofijivulukakizedar.pdfIn PDF document text
    • https://meruxanige.weebly.com/uploads/1/3/1/6/131636855/6164403.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477623/normal_6007bd702af90.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/hiUbrha/horizon_fitness_treadmill_belt_adjustment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426813/normal_5fef613114638.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/b5jije0/can_raw_frozen_chicken_go_bad.pdfIn PDF document text
    • https://dopitusorotid.weebly.com/uploads/1/3/0/7/130738794/458435.pdfIn PDF document text
    • https://muxiduxipa.weebly.com/uploads/1/3/5/3/135319221/8909906.pdfIn PDF document text
    • https://xowozasa.weebly.com/uploads/1/3/3/9/133999953/958078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475737/normal_5ff4ec7f77c25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_5fd67cdce9042.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/mupogi-xajaza-lolikufe-bobewijanomisal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496225/normal_5fcacb14943e3.pdfIn PDF document text
    • https://crophysi.ru/wb?keyword=martin%20luther's%20commentary%20on%20the%20book%20of%20romans%20pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/pipebarekokugepivatuli.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_off0000c2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B4 5740 bytes
SHA-256: 67d0191885def04de9deb37ed4c1d3ab5e66f16d9ba309f7ef5080c3c7967743
font_01_sfnt_off0000d624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD624 9572 bytes
SHA-256: 65c65e0e10ec779cdf3278aa6d75d41eae89fdc92e6bd6b7e7f6d62f8a2ff15a