Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a4ac9c122c0666c…

MALICIOUS

PDF

72.0 KB Created: 2020-12-03 23:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e5f4198e74059dec3b9b55fd48f93c39 SHA-1: dd2a13565ea875593dbf2236a34bdd589502f756 SHA-256: 6a4ac9c122c0666c35cdc24f4cd6dd1cb041c279fefff1d59e488719cffb3591
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with critical heuristics identifying it as a malicious redirector link and a PDF link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'Global pet food outlet locations' and authoring information, suggesting a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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?utm_term=global+pet+food+outlet+locations In PDF document text
    • https://duxudalo.weebly.com/uploads/1/3/4/8/134866109/3432822.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/mizunima.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/talibazaxuwudozovi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/zutuvetadasubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b040cce-429d-44ec-8e17-b3159dceed69/steven_universe_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10b9cab79f442f22a6952/t/5fc251b59d79364840d94168/1606570425328/parker_o-ring_handbook_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f27442f3-e401-4d45-bcc0-940dab9337ad/xumazuzezobegupun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06b0d2e537a05ef0695ba/t/5fc0f59561e25426e15a8c9d/1606481302262/elements_of_physical_chemistry_solutions_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe21dbe18c5c478ec4a9d0/1606296028385/smiling_hill_farm_goat_yoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe11788-8fd0-402a-82c0-69efe607a4da/david_santos_redondo.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/29014088783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d51fc9-062e-4b9c-ab4a-184516a86b4c/die_sterntaler_eng_sub.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_off0000dc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC54 5224 bytes
SHA-256: 83cc7592a90ac57bcb8c590f3f8e3185de9aca72fbddfef61b5a6b9440d5fb2e
font_01_sfnt_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 10820 bytes
SHA-256: 6a2bc723d73686348dc766982350f2548bad53a1a6176c33423b13140cea5e12

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