Malicious PDF — malware analysis report

Static analysis result for SHA-256 a982d37e4045b919…

MALICIOUS

PDF

76.3 KB Created: 2020-12-21 17:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bb636599e6a02ed63b0d6ac3ab25d659 SHA-1: 77455fed1017a7d25c2b8d46874cb9f1597607d6 SHA-256: a982d37e4045b919a25f46a61cad013014c9164fd94c0cf2274261c8abfecddb
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF_SEO_UTM_REDIRECTOR_LINK heuristic firing suggests the document is designed as a phishing lure, directing users to a URL that is likely part of a scam. The embedded URL, https://trafftec.ru/aws?utm_term=inventory+value+report+sap, is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=inventory+value+report+sap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5fc1cf2d59355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f8e2fbd3ad59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405652/normal_5fdc1ba7e12aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387428/normal_5fdeab9f7777c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdfcbce76a868683c6625e5/t/5fe00e796a6ad7222f405344/1608519305418/62823988515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d15a620-4786-4132-a208-99ce5e5175cb/62983264297.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/65463164730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c75a5ab5-18a4-4158-8369-58525076dc5c/gezibido.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/37269732867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f402ba9e-6507-4ebe-a599-54de82ce99d0/rotoxado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38269880-be9d-4c88-9e19-7af0421ef7aa/25629179976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a587150d-142e-46b9-95fa-74acf0d9c117/92185747370.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/98634700099.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_off0000ead3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD3 4912 bytes
SHA-256: 9cb0b248fbb608343ed26a8c95ebe907baee8c8e9a160a75eb9d20f95ac602e3
font_01_sfnt_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 12500 bytes
SHA-256: 97bb179173f78ce97e3436a0c7023646f40cefde5f2e6077c89e123c588ded17