Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5a29a2c3184300…

MALICIOUS

PDF

65.8 KB Created: 2020-11-13 07:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7177e4bd236d7dcc1a53aaf77d07df3 SHA-1: 18b5607c86a02a91c35d0010393b1838a90b4181 SHA-256: bd5a29a2c3184300b83bf4ee0bf35bd46495d95339bf9813caa37106b0b0ad15
214 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=tulane+anatomy+certification+program
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/e2dcfcc4873520c.pdf
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/ruxef_nugamuba.pdf
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f87afdd4657d.pdf
    • https://cdn-cms.f-static.net/uploads/4422147/normal_5f9ad782f285e.pdf
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f86fa329dce4.pdf
    • https://cdn-cms.f-static.net/uploads/4474977/normal_5fa8bdfda8c73.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/64a1b81c-a9a1-4879-aa73-af1e3a20d1fc/logububit.pdf
    • https://s3.amazonaws.com/fosagoba/26801208166.pdf
    • https://uploads.strikinglycdn.com/files/d38bbdb4-99d0-4756-9eaa-ea29c35f21f2/19922046417.pdf
    • https://uploads.strikinglycdn.com/files/144ec605-6f03-4d13-8655-2ba5c010f35a/zigefumogafu.pdf
    • https://uploads.strikinglycdn.com/files/50951f63-8ab8-4b83-83eb-6888cc5d3637/felitirefewo.pdf
    • https://uploads.strikinglycdn.com/files/208a98a9-7456-424d-b7b9-658a2b9a64af/78922242430.pdf
    • https://uploads.strikinglycdn.com/files/f5872bdc-1362-42e0-8e3a-58989a87fee3/94369765983.pdf
    • https://uploads.strikinglycdn.com/files/3b7dba0a-a7e3-4a1c-b59f-15e05a1ce7dd/11059972410.pdf
    • https://uploads.strikinglycdn.com/files/483a5acf-1ba1-467d-b421-478885b94c5d/40020641416.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_off0000c667.bin
21fef51bb5bd72f5f21ee8016165206048dd778e060b85226a207e66c7065ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC667 5208 bytes
font_01_sfnt_off0000d81c.bin
ec1c59e1daabe6e8a7707674bfa857918544344c3a55f2291acc71cf789706b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD81C 10076 bytes

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