Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e61b7864312fbfb…

MALICIOUS

PDF

65.1 KB Created: 2020-12-22 22:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc0363415f4ffefa9a7bbaf655e7b049 SHA-1: dab893dc298c490b7932b58966a4eba174081b1c SHA-256: 7e61b7864312fbfb4ee1b0f652ed529cfabec21770151cc6a813cfd4a5b0deea
214 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, including a known malicious redirector and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest a phishing or redirection attack, likely aiming to lead the user to further malicious content or downloads.

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://cctraff.ru/aws?utm_term=customer+service+training+schedule+template
    • https://fivepixulata.weebly.com/uploads/1/3/4/7/134747110/1050aa6.pdf
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/2225a.pdf
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/xijijanosobu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ec6df157-bf19-490c-9a95-fe5265e811fa/49801171307.pdf
    • https://uploads.strikinglycdn.com/files/6c75567f-34e1-411c-a034-a17413f430ea/luliteliparu.pdf
    • https://s3.amazonaws.com/fedojigudaj/cantata_bach_147.pdf
    • https://s3.amazonaws.com/jijumupade/best_squarespace_template_for_video_2018.pdf
    • https://s3.amazonaws.com/bidivo/46523745683.pdf
    • https://s3.amazonaws.com/nefunupu/99877583630.pdf
    • https://s3.amazonaws.com/zetare/jujikafolonijaza.pdf
    • https://uploads.strikinglycdn.com/files/8d6d048f-cf8a-49a2-8a2d-ce981c9d60a4/7840343464.pdf
    • https://uploads.strikinglycdn.com/files/96e17c18-7d4e-4d01-b248-3abd68a86625/71664859719.pdf
    • https://s3.amazonaws.com/metakibeme/gajoselanekuledi.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_off0000c318.bin
00b422c7124ca369bffcb70aa76cd8c53592f7bf17bea11d1940758977d16616
pdf-font-stream PDF embedded font (sfnt) at offset 0xC318 5452 bytes
font_01_sfnt_off0000d576.bin
33ab8409ef77c45f74e57ef9d13f7ef8d56aff8b9e082aa5c5a203807bb895f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD576 10016 bytes