Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f40cd315ad716b3…

MALICIOUS

PDF

66.2 KB Created: 2020-12-07 04:38:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59ef428ff2dcf1e019ca3eb0b71ab3af SHA-1: 54335c449d7ffed67df05f8f5496dafda4a09770 SHA-256: 2f40cd315ad716b322f3c972e86a379cc82c0fb913f08f8b3a08d2c6d2661355
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=nalpeiron+licensing+service+que+es'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body strongly suggests an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=nalpeiron+licensing+service+que+es
    • https://static.s123-cdn-static.com/uploads/4466676/normal_5fc90145cdce5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/31962c36-4f21-4f74-b633-a4cedbce4bd0/can_you_eat_cooked_chicken_cold.pdf
    • https://uploads.strikinglycdn.com/files/5469e0f2-7619-42e2-8cd2-5202998c5783/trials_of_apollo_book_5_free_download_weebly.pdf
    • https://s3.amazonaws.com/muxozuvalubi/genuzo.pdf
    • https://s3.amazonaws.com/baxunaf/kikipuso.pdf
    • https://static1.squarespace.com/static/5fc0fd9af9866f3fd2d4d777/t/5fc1303f3570fb44d12dd23a/1606496325286/86593934189.pdf
    • https://s3.amazonaws.com/jadere/wenijijibumituruvofa.pdf
    • https://uploads.strikinglycdn.com/files/6fd89976-c075-4811-9bb8-94fcbd9a1b8f/93426368118.pdf
    • https://uploads.strikinglycdn.com/files/20e520fc-64c1-48da-b1b1-05513370307d/ewr_Flughafen_Wetter.pdf
    • https://s3.amazonaws.com/punurum/jubazenerotutavidikozad.pdf
    • https://s3.amazonaws.com/wenobagupexekap/75108192308.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_off0000c44a.bin
99af7a1957253f344e149826846bc9b950467497bdc385636658b7c3ecadf28f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC44A 5256 bytes
font_01_sfnt_off0000d648.bin
fabe395eaf166c1f87f164aba6bcc32a1dd66629aa3120500bc5d59c288df2b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD648 11600 bytes