Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc696cc2fe8ed98…

MALICIOUS

PDF

91.8 KB Created: 2021-05-31 01:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25c8f465ebdbbf3abace107500abb738 SHA-1: 24fffb8d163a59a8bb7d9df7aa52d14b285c7343 SHA-256: 6cc696cc2fe8ed98b9f559b26e523163609e0e15a609e9fbd75346d8d10c977a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/123?utm_term=top+alternative+songs+2018
    • https://static.s123-cdn-static.com/uploads/4409421/normal_600004e494191.pdf
    • https://nagobajega.weebly.com/uploads/1/3/1/3/131380413/3cf3a2.pdf
    • https://cdn-cms.f-static.net/uploads/4384045/normal_600f9970833c4.pdf
    • https://funemozivadomuz.weebly.com/uploads/1/3/1/3/131398429/f27b0870009.pdf
    • https://static.s123-cdn-static.com/uploads/4427783/normal_60082e3cb0dd5.pdf
    • https://cdn-cms.f-static.net/uploads/4451350/normal_6022dfc5e8412.pdf
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5fff6a3e9d3a3.pdf
    • https://xikiwideb.weebly.com/uploads/1/3/4/7/134730665/5184438.pdf
    • https://static.s123-cdn-static.com/uploads/4461249/normal_6006007466d7f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/236ac72e-ce99-4bb1-bde7-240e4f91bff9/59146733937.pdf
    • https://uploads.strikinglycdn.com/files/bde4e8c9-3ccb-4070-8e0d-27c96839ea28/folofiwizamobalivalowuxo.pdf
    • https://uploads.strikinglycdn.com/files/ed00cce1-5058-48a9-9270-60ce40ba76e7/tezowigi.pdf
    • https://uploads.strikinglycdn.com/files/90d33b22-eb03-43b8-9f57-27beddf08f6a/what_does_percentile_mean_in_gre_score.pdf
    • https://uploads.strikinglycdn.com/files/f160f094-2667-4494-ab8b-cdfdd2c26d9c/pijikanubenabonuvukevo.pdf
    • https://uploads.strikinglycdn.com/files/976ddbee-c8cc-4b64-b205-f4c9d43af490/asus_sabertooth_990fx_r3.0_drivers.pdf
    • https://uploads.strikinglycdn.com/files/83c45f5b-505b-4022-b8e8-40984c44e50e/dell_745_drivers_win7.pdf
    • https://uploads.strikinglycdn.com/files/de035f55-4c44-4c93-a477-fe2301d7747d/what_is_the_role_of_formal_writing.pdf
    • https://uploads.strikinglycdn.com/files/134be30a-021a-4a52-826a-d872d55a2f65/barepetup.pdf
    • https://uploads.strikinglycdn.com/files/5f286744-b24f-4f26-8af2-52d872c440fe/11829835889.pdf
    • https://uploads.strikinglycdn.com/files/be10b847-4ae1-4634-87ab-c633cd991162/80278269736.pdf
    • https://uploads.strikinglycdn.com/files/51b9ac33-6ea3-4202-bfc9-7c71ffd984d3/what_are_three_characteristics_of_a_myth.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125f8.bin
4b1ca21d965f374fae9dc62fb3d5a43f2acec2b2d2706f28fc4048d7ebefc68f
pdf-font-stream PDF embedded font (sfnt) at offset 0x125F8 5516 bytes
font_01_sfnt_off000138d2.bin
2c73c6e0b2bce0becf600c933db693b73360a47485df0cf7d1eba035c103e136
pdf-font-stream PDF embedded font (sfnt) at offset 0x138D2 12088 bytes