Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d65c3f3f3439c8…

MALICIOUS

PDF

71.7 KB Created: 2021-02-14 14:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 55ede1767baec2df2c00fe5116a03fa9 SHA-1: 7ec366cb84c0b3e137f6999de7c75ad323fda07c SHA-256: 42d65c3f3f3439c80857bec6e2d973ce35aa3973a0b33124bd18fcc777895593
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://bologen.ru/wix?keyword=watergate+primary+source+worksheet+answers+pbs PDF link annotation
    • https://cdn.sqhk.co/jupujezaxa/6jegh0f/lixel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402289/normal_601e686e34bdd.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/434d053635983d.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/classes_guide_three_houses.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/VjdsoWj/dragon_quest_adventure_of_dai_manga_english.pdfIn PDF document text
    • https://bezumovepefare.weebly.com/uploads/1/3/5/3/135337037/977123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_6011edd990b03.pdfIn PDF document text
    • http://retapobu.iblogger.org/cafe_society_movie_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tizudukokeni/aHhaifH/sunny_words_level_22.pdfIn PDF document text
    • https://pojajowose.weebly.com/uploads/1/3/0/8/130813819/tolegiri.pdfIn PDF document text
    • http://vodabezoli.iblogger.org/37396680221.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fff6121ca16e.pdfIn PDF document text
    • https://jimedugevebuz.weebly.com/uploads/1/3/4/4/134437071/tizegiti-nijexutibibejo-pavelunog.pdfIn PDF document text
    • https://bumogekatagod.weebly.com/uploads/1/3/0/7/130776321/6dd63de.pdfIn PDF document text
    • https://fujuzelos.weebly.com/uploads/1/3/1/3/131380065/kimopis_xafixaf_bituborok_kinagepafig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wusasozomumag.epizy.com/falciform_ligament_in_liver.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_off0000dba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA3 5728 bytes
SHA-256: 016e8b9b1bc40b7f7c7d63c53c781a3f42275b300398ca863c098ff8f9c9ce59
font_01_sfnt_off0000ef1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1E 10068 bytes
SHA-256: 2919e4d095fa01b08bf5348b4e00d552d3cbf8044f3fd4ffd0ec61be1e1ad1f9