Malicious PDF — malware analysis report

Static analysis result for SHA-256 96546027df9fe36d…

MALICIOUS

PDF

102.2 KB Created: 2021-03-16 17:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 51d5c41769dc30e9aaabf06523deef08 SHA-1: 7009efb04d6f00cb6082b5a52eae060c77f9375b SHA-256: 96546027df9fe36d200796f1eb1a2c1f6a06081d2e404e211ba39d875ea0848d
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/strik?utm_term=diamond+infinite+edge+vs+sb-1 PDF link annotation
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/24842.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/gfM8gda/dinosaur_simulator_codes_for_dna_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/MjbXghf/u_mobile_top_up_rm50.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/6jdggha/cinematics_the_movie_guide.pdfIn PDF document text
    • https://kaxogabetex.weebly.com/uploads/1/3/4/3/134320086/a97211f43295ba.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/cPYa3ia/maserati_quattroporte_price_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/Ujahbib/business_insider_tesla_news.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/Fqieoif/risk_dashboard_template_powerpoint.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/jJV5xHq/fofumefeza.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/41e8edd8-1444-4723-b77c-8d9aa95c41dd/personal_safety_panic_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcbc68e-64ac-4570-a6f0-97316e64d7eb/44471934548.pdfIn PDF document text
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_8414bfeac6da4e83816f2ebeb08fb750.pdf?index=trueIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_ab48dc44847a4539911cebdfee5a57ab.pdf?index=trueIn PDF document text
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_524a2fb606ea4f93ba2d23d545d3a6e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7cbcfaa-69ca-49d7-b2cb-0c8bd47766a1/how_do_you_use_a_hoover_steamvac_carpet_cleaner.pdfIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_395b62a664384eb58e45aeb839ba8275.pdf?index=trueIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_c749272058a44abeab5e96e60126bf4e.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F95 5172 bytes
SHA-256: f2c8193c135cf7944e2b979db665dbf14e68bd4969494bed9325c7922909b0f6
font_01_sfnt_off00014135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14135 11476 bytes
SHA-256: bac6ed12979b45584b0e900245285c2fb63f20e4ce683eb2c5a7e0aaf6467de3
font_02_sfnt_off00016867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16867 16064 bytes
SHA-256: 2ea080f5ee659da04ff296b2667695e28a2ccea1917dd042ada5b6026cc3b03c
font_03_sfnt_off00017cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CF5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c