Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc28300628e46889…

MALICIOUS

PDF

37.7 KB Created: 2020-11-01 17:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 9059b9139ca48c1519c5f85ed38c6e05 SHA-1: c369b876acd0170233d208e0ecc1d4da81647162 SHA-256: dc28300628e46889b49a8b0877618be0ca3c4ed6cedec0a4d48176c562dd888e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/aws?keyword=delta+scroll+saw+40-540+stand In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f872e4dce418.pdfIn PDF document text
    • https://gizojobov.weebly.com/uploads/1/3/4/4/134436228/rejanuvabed.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/0ef521270.pdfIn PDF document text
    • https://musazowoxagaw.weebly.com/uploads/1/3/4/3/134323980/rofapelosilozanil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_5f91f32709f74.pdfIn PDF document text
    • https://fimetopim.weebly.com/uploads/1/3/4/3/134399480/5656594.pdfIn PDF document text
    • https://nabutamu.weebly.com/uploads/1/3/4/5/134525390/9372150.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/5151000.pdfIn PDF document text
    • https://pelofaneb.weebly.com/uploads/1/3/4/2/134235527/xowosagavebereduxo.pdfIn PDF document text
    • https://lafowesatumu.weebly.com/uploads/1/3/4/5/134503032/wokojadip-gajolifazusini-gupigefubibuvor-bavuvawojunim.pdfIn PDF document text
    • https://mizemetugez.weebly.com/uploads/1/3/4/3/134322353/6472345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f95d1ba5f7e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad844836-48ce-4020-ba8e-de480c89d1fd/96392256987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c18406f-32e9-4d5d-8e5c-287465c9560d/desmanchar_axilas_con_peroxido.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_off00005308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5308 5408 bytes
SHA-256: 4880ae4066f4564875fb6489bc13af59613447914125d3b1e6eb742025f784bf
font_01_sfnt_off000065a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A5 10932 bytes
SHA-256: 6002a4c9b1f4cf86e34e1e2eaf2d2659ba40b5c6fd0ccdb69fac313955e23627

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