Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde77765dc0ce60c…

MALICIOUS

PDF

49.3 KB Created: 2020-11-09 08:33:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b19d6b687252e364427ad82af3a67c51 SHA-1: 7d7cc46f55fada462ad06ed0810ddba42b674583 SHA-256: fde77765dc0ce60cbfe20dfb2c7307640f0b42515211fb5bb28398baf5d0e794
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafftec.ru/aws?keyword=pokemon+roms+free+unblocked+for+gpemu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f89cd9b3da94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5f95838d11b7f.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/37d346d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f8a2d2a7880c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f91ff32b254f.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://zojemadej.files.wordpress.com/2020/11/73587489466.pdfIn PDF document text
    • https://wibixuw479822343.files.wordpress.com/2020/11/ratesig.pdfIn PDF document text
    • https://dedisix.files.wordpress.com/2020/11/catholic_bible_malayalam.pdfIn PDF document text
    • https://jurimewuva.files.wordpress.com/2020/11/the_crown_streaming.pdfIn PDF document text
    • https://dolenukiwiwe.files.wordpress.com/2020/11/vurowig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ad25b0-20cb-42d2-8fbb-a642962ba023/79330598819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aabe9a09-bde6-4b7a-8d2b-9b3f70b1dfaa/13911790576.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_off000070ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70EA 5224 bytes
SHA-256: 3bfc98397af90c96a1a83e05b2ec316dde6d23c1ece19f8593d8e68335a952bc
font_01_sfnt_off00008288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8288 11892 bytes
SHA-256: b8b69570db48e44668b607c50a9c37755fb22db52350855b4118bf18f73babbe
font_02_sfnt_off0000a9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9DA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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