Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6b09648a1bfd58…

MALICIOUS

PDF

78.9 KB Created: 2020-12-30 19:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7c28815113bd0036fdaebbd16fa7edbf SHA-1: 935486b2767ea78298059a27264c360d85241bef SHA-256: 4f6b09648a1bfd58c1f27d94a1676fe0b80443727aa4ba8e8b44679347683059
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to harmful sites. The ML classifier and ClamAV detection further confirm its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?utm_term=wild+thing+pre+workout+price+in+india In PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/Thdz2C1/jagevogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5fbc25f32e867.pdfIn PDF document text
    • https://tijaworiluwulu.weebly.com/uploads/1/3/4/3/134363233/pamajuzebokos_xomuzewepadis.pdfIn PDF document text
    • https://wenezobu.weebly.com/uploads/1/3/4/6/134625155/6a189ba6903b.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/jghL5hf/79500456507.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/bezuwaligoxever-xofuzawituje-wawom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_5fa5e059bbc49.pdfIn PDF document text
    • https://lakujasoramaw.weebly.com/uploads/1/3/4/4/134400634/letoposugaduxexiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5fb485593af4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473049/normal_5fe72948b4389.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/biwimuwumepipudu.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/coriolis_meter_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/27099374495.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/star_wars_the_force_unleashed_2_trophy_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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 5208 bytes
SHA-256: 4b81bc3074d9e5427244e4c184b339ff07edf22ea1bb98873a8fdf62025f8a8a
font_01_sfnt_off0000e5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E5 10828 bytes
SHA-256: 4af77c5060a4a96dfe3441ab93794522624af8c057e4f5912977d624b6744b9a
font_02_sfnt_off00010afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFB 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
font_03_sfnt_off00012014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12014 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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