Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91aeb9b7626292c…

MALICIOUS

PDF

76.1 KB Created: 2020-12-26 22:09:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ed474159463bb328a81bd6afac79ceb6 SHA-1: 9616e76fe3a4b670b9417f03d89c85b2c256b141 SHA-256: e91aeb9b7626292c2f76d7580dfad6259146702f45c89b6b59e0756403868716
136 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic indicating it is a phishing lure, linking to an SEO redirector. The ML classifier and ClamAV also flagged it as malicious. The embedded URL, https://trafficel.ru/123?utm_term=bw+trailer+hitch+lock, is likely part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?utm_term=bw+trailer+hitch+lock PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413969/normal_5fc78bd70cc58.pdfIn PDF document text
    • https://mabosuvix.weebly.com/uploads/1/3/4/8/134851695/jimesuxonuto-bogof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_5fa02fcc4c92a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443804/normal_5fdc65dc19509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5fbafd030f4b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_5fb71cd6c7e2e.pdfIn PDF document text
    • https://dubasatipin.weebly.com/uploads/1/3/4/4/134459773/bbe65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471464/normal_5fcea58f5e41a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/21169769503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c419a48d-2a28-4727-9ff7-bc81ae6b3c5a/39563861622.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/fusionner_doc_avec_creator.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEED 4912 bytes
SHA-256: 7125259f915273ea172f58f0f05122f8d4a499ba5c313c4a27ecca19291f1e8f
font_01_sfnt_off0000ffaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAF 10596 bytes
SHA-256: 519a9cee573a95a252fd42bcf830a8a20dbac642932fc9a46db33313f4bcea94