Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c6e0b7f342d5dd…

MALICIOUS

PDF

74.9 KB Created: 2021-01-21 04:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 0b916ce9b8e039786474bfd63ac45e08 SHA-1: 72d1378d63cfdd6212ad96305df4d950e8c6edc3 SHA-256: a0c6e0b7f342d5dd519ce1ba97f4d6ff1f765c5a62856feef0e16c11b3562fcf
244 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.
  • 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=among%20us%20mod%20ios%2014%20no%20jailbreak In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417998/normal_5fc2fd2088aae.pdfIn PDF document text
    • http://nemekarasika.iblogger.org/multiplication_table_2_5_10_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5f87e6612a7c3.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/puguxabukofawamib.pdfIn PDF document text
    • https://site-1209079.mozfiles.com/files/1209079/nasal_cavity_bone_structure.pdfIn PDF document text
    • https://xixilizuxuwogag.weebly.com/uploads/1/3/4/8/134879277/movozope.pdfIn PDF document text
    • https://sileperu.weebly.com/uploads/1/3/1/4/131406390/dunisojig_ratiwepax.pdfIn PDF document text
    • https://site-1225090.mozfiles.com/files/1225090/when_will_texas_campgrounds_open_in_michigan.pdfIn PDF document text
    • https://site-1173584.mozfiles.com/files/1173584/ruzozotepeguguzel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5f8d11ae494e2.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/muvukozotorigum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459477/normal_5fbc0eba2ea33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fa82e657d155.pdfIn PDF document text
    • https://lukazerud.weebly.com/uploads/1/3/4/3/134343231/kexep-simese.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487432/normal_5ff51a19edf8b.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_off0000e4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 5556 bytes
SHA-256: 33e3d94229750451e6f49498de906f410c882dd945d72006da8f848b544a6180
font_01_sfnt_off0000f7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A0 11628 bytes
SHA-256: 683e93f3dbfaf1240d49917151b8e2e4c0c8d1453a12817ea032d7a995fe45f4

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