Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8742c53ad14ebdb…

MALICIOUS

PDF

45.8 KB Created: 2020-10-27 16:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 84ff9d6f27fa0eb43195bcff16466a8d SHA-1: 00206661872af42609099de70c7d16be70d0cfa5 SHA-256: a8742c53ad14ebdb24298f2dd8b85bb217e7d8245952a4015d35793b32c2b593
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://gettraff.ru/123?keyword=sears+band+saw+tires In PDF document text
    • https://soxixafefude.weebly.com/uploads/1/3/4/4/134434462/janifabifuxede_donisasasufot_lelapojufogosa.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/9477668.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/wifalepom.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/64d3b7d32d8a1e0.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/4b8c57f23e76d7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5f8d136fc3d12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5f8d07676222a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f9610eb7ccd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426080/normal_5f977627cfa5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f8d96098c69f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f918a3ee584e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_5f929b5181792.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://uploads.strikinglycdn.com/files/2983b596-6811-4f1b-8840-1401a2abda12/74487333111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5279bdc-93d0-4bf9-9c66-e222bdb0ea2e/98665568576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eee0913-7929-45f4-a075-fed97d74da47/nanizofodetexuputede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef18aa39-17a6-427e-bb74-98889da5e199/office_2007_full_espaol_activador.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c447a7ef-c691-4e43-a7be-fc383a459e6c/dead_maze_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e48744-1aeb-4040-a717-12a96961266e/novetoluvore.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/isospora_felis.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/burden_of_proof_in_criminal_law.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/free_way_space_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/misegototuruxukelaveb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B6 4800 bytes
SHA-256: b227bf8ee3fad804474567170518855cd4f194c96ec5eaf444e724396ab63945
font_01_sfnt_off0000790b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790B 10404 bytes
SHA-256: c3f58621f4cf349f9d65682df6c8cf4d9ff9409e4582f146555d36cabddb8cfe
font_02_sfnt_off00009c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C33 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3