Malicious PDF — malware analysis report

Static analysis result for SHA-256 92730a5747941049…

MALICIOUS

PDF

41.6 KB Created: 2020-11-07 04:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 766c6b7e0811f7a23d5b368d97030674 SHA-1: 8fe95bb780ffc5a74529eb11816e73dd680b5c13 SHA-256: 92730a574794104904984e5be42b90dc3734e669bf168c9382a8cec2b6120258
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://traffking.ru/aws?keyword=msn+games+text+twist+free+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8a02f1a6677.pdfIn PDF document text
    • https://woxomeze.weebly.com/uploads/1/3/4/4/134498023/lotodulawogowa.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/2715656.pdfIn PDF document text
    • https://gesinanafu.weebly.com/uploads/1/3/4/4/134481382/kigigataxubupozede.pdfIn PDF document text
    • https://mesovozilepako.weebly.com/uploads/1/3/4/5/134588792/2712136.pdfIn PDF document text
    • https://jivenikovo.weebly.com/uploads/1/3/4/3/134308789/pumarijuzepatan.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/504bc386-a023-454e-803a-eb39ae51a20c/lezixujegixujavojid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c0f2f4-c818-402b-abea-bb889914005f/nobeju.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/aukey_dash_cam_dr01_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/petopizawevazij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16cc314-cea3-4788-92d9-9080a6e80dc1/zinumawijojuletabilitep.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_off000065c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C2 5252 bytes
SHA-256: fbc539fcfc874925cf4be861e2064d6e7b8dc2d54f663f0b75121231f4c5aa18
font_01_sfnt_off000077af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77AF 9832 bytes
SHA-256: 7b4d6e2d7ee79c8f0a1f190120533189baf01b79743b75c531d07c798aa61aed

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