Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06cad42dadec2c6…

MALICIOUS

PDF

45.3 KB Created: 2020-11-01 15:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1a2ab7398095f8eaba11345ad36a2ca0 SHA-1: da42170a0a2f71475c41c1125147aef6c29aec4d SHA-256: a06cad42dadec2c69dcdacf194b1a3c12a900b0a1626209b99289cc5aa0b31ba
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a prominent link that redirects to malicious infrastructure, specifically advertising 'Gta mobile apk xbox'. This, combined with the heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, indicates a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?keyword=gta+mobile+apk+xbox In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5f8971ac44ee4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8e4077f1149.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/ledazopinonutewokuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8c8a6a9c2ba.pdfIn PDF document text
    • https://favunabev.weebly.com/uploads/1/3/4/4/134445728/raloxomedewov.pdfIn PDF document text
    • https://judamuguduvawa.weebly.com/uploads/1/3/4/3/134352100/8443938.pdfIn PDF document text
    • https://bujegeti.weebly.com/uploads/1/3/4/3/134355457/lilawobatifusuz.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/50a70f0d-c15c-4a9f-a51a-8f70a68a051f/koviwumojovukobutapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a5abaf-0de7-4368-a728-1bec5fd94ad4/depth_map_from_stereo_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2125/9675/files/fury_warrior_leveling_guide_vanilla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/6753/6046/files/57451895241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac66d93-3da5-4363-83c8-63f57bcc1dbf/zokepebe.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_off000065fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FC 4992 bytes
SHA-256: d1413cc8329ee743ffe029ed19a3c47da31d7fa1e44aea85f0b06545baea16c4
font_01_sfnt_off000076e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E7 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00007f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F75 12320 bytes
SHA-256: a9b2440cabcbd5dac69a7ded8745470c0f9214bac16a5416a8196000bbf1d3bf

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