Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf9da4f72c10260…

MALICIOUS

PDF

42.2 KB Created: 2020-11-08 17:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6d78dda5940c79ccaf3183b10defc8b4 SHA-1: 508be3900056b5af074ad02cced6de348a18aeb7 SHA-256: abf9da4f72c10260061cfdfb681b7a278c0bab1142169c4de8e865b5c7c3a9fb
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://traffine.ru/aws?keyword=southern+high+school+football+roster In PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/5925643.pdfIn PDF document text
    • https://gulijigomun.weebly.com/uploads/1/3/4/3/134350957/160cbe37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5f8b7182a2e49.pdfIn PDF document text
    • https://naletonuve.weebly.com/uploads/1/3/4/3/134381452/zuxoza_gaxubikorufad_mojox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f920f5d30b45.pdfIn PDF document text
    • https://roromitekavu.weebly.com/uploads/1/3/4/5/134528712/1359f240.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/lodibanulimes.pdfIn PDF document text
    • https://lepitosamodovax.weebly.com/uploads/1/3/4/3/134335454/9cfeab.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/eeb184f3fde.pdfIn PDF document text
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/delijigi_rodulasuwojogu_tutur_rinarone.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/1fbf6f72-731a-4294-aaf7-a86ea6386e7a/defufajezefuveso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de95b852-af7e-4cc9-8d78-fab38f37ffdf/27766941993.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_off00006761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6761 5384 bytes
SHA-256: 7610d7f5d5fc5b57bc8b0ed8aa1826088ff8960d12f34111b12798096d5963a3
font_01_sfnt_off000079b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B4 10176 bytes
SHA-256: a3f2480ec30d0ed459fa4700439c33ee46af1df94872d6e7de08a494701a5e93

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