Malicious PDF — malware analysis report

Static analysis result for SHA-256 febde8aee5d09baa…

MALICIOUS

PDF

77.4 KB Created: 2020-12-28 17:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a31882bfcbe5e323636bff4086a39975 SHA-1: d381117216a3436a8ed734066b327c90edb003b8 SHA-256: febde8aee5d09baad1c652ae912e021b023f1709f9e9b810dcbcc89c44969b12
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with a critical heuristic firing for linking to known malicious redirector infrastructure. The primary malicious URL identified is https://traffmen.ru/aws?utm_term=aha+bls+2018+test+questions+and+answers. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/aws?utm_term=aha+bls+2018+test+questions+and+answers
    • https://samoxaposem.weebly.com/uploads/1/3/4/3/134361226/xeviloriwofeluwezuwa.pdf
    • https://fisezogidegogef.weebly.com/uploads/1/3/2/3/132303301/234806.pdf
    • https://cdn.sqhk.co/supuzeren/i0ifgcj/25641453801.pdf
    • https://cdn.sqhk.co/wodigajamu/a4iaHjM/31096317971.pdf
    • https://static.s123-cdn-static.com/uploads/4417998/normal_5fcc2bca4f0be.pdf
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5fe87801a4953.pdf
    • https://tegupovo.weebly.com/uploads/1/3/0/7/130775278/9919448.pdf
    • https://xesapidad.weebly.com/uploads/1/3/4/3/134346602/2df9c2aa54cbb5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c03e7b1d-b33d-48f2-919b-f33239c83a61/24606626098.pdf
    • https://s3.amazonaws.com/vexeliku/royal_bhumihar_image.pdf
    • https://s3.amazonaws.com/nezanurugega/werixobiwemusimusinimu.pdf
    • https://s3.amazonaws.com/jolozidabi/top_movies_website_name.pdf
    • https://s3.amazonaws.com/gizonukorad/xixat.pdf
    • https://s3.amazonaws.com/lewuli/fuledotovapizuwir.pdf
    • https://uploads.strikinglycdn.com/files/4dbe7629-b52d-4dfd-8e3d-6c5a8a86e031/85564462169.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_off0000f0cf.bin
bff7692f5bb81627239fe9dc1a7ee30634673f493a73fe744e801b83c8ed276b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 5780 bytes
font_01_sfnt_off0001047c.bin
de24402de9e11271ea20f28b981e3616d9faf6dab4bae54681bb55e5eefbb6f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1047C 10640 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.