Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e419bdadaa2454…

MALICIOUS

PDF

60.9 KB Created: 2020-11-24 15:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a12152b51f40f6af12b0fea07405fefa SHA-1: 667a1b53fe9c66e1a4d6b5133ec309cb1f149ca9 SHA-256: c4e419bdadaa2454477e0cc28dbe475d5d8e49903ceae8dc853bc03ac4a45246
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of a link farm suggests an attempt to distribute malicious content or phish users. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/strik?utm_term=magickal+riches+damon+brand+pdf
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f88f54df1621.pdf
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f8c1e1af325c.pdf
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f8b2904eea7f.pdf
    • https://cdn-cms.f-static.net/uploads/4451047/normal_5fa232646fec6.pdf
    • https://cdn-cms.f-static.net/uploads/4455406/normal_5fae312a82ee4.pdf
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/falizesudiku.pdf
    • https://cdn-cms.f-static.net/uploads/4411270/normal_5f9a47899d8b6.pdf
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f9049cd21dce.pdf
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5f98b018e5fa2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e58a9ceb-fee9-47a5-bdae-c7aea73da27a/early_decision_vanderbilt_2020.pdf
    • https://s3.amazonaws.com/zuponefi/wepojusaxilokibexulon.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_off0000b250.bin
d3815859111befa54910a875fdfbcf730c04b7dafb12e5eddfe490edeb99193c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB250 5776 bytes
font_01_sfnt_off0000c5db.bin
50cb1fd80e6bc04d8f4ebca5e38790b9b434e523eb767ea15eb727b2cddb4dac
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DB 9892 bytes