Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc98e874fd73386…

MALICIOUS

PDF

74.4 KB Created: 2020-11-26 18:51:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 80c02f60c797803487a43e37f1600d0a SHA-1: e2664a5d4e26f16a7b02890893c393dccd0ed2c4 SHA-256: edc98e874fd7338692e000d3baf55f9745f0e144ee642d3a6a0b525e4b29dddc
136 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. A heuristic identified an image lure linking to an SEO redirector, which points to the URL https://traffset.ru/123?utm_term=generativity+versus+stagnation+age. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or to download further malware.

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://traffset.ru/123?utm_term=generativity+versus+stagnation+age PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450152/normal_5f9e182d32fa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f8c8a6b58cf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481423/normal_5fb2786f11fdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_5fa2110ad1109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402289/normal_5f93927839e01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f9fb0babfc37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f88f2bb7ade9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_5f931766bd7f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_5f97bf633c8e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f953779a9ee3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_5fa7ed47bab09.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/bifamomove/earn_to_die_2_free_download_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc42c1e-d84a-4c78-8f4a-8ab0257434ad/pioneer_n_30ae_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f4e1101-f34f-4238-9a63-75cad23b2a69/tijikofumaxipalejemidotuf.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_off0000e746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE746 5016 bytes
SHA-256: 77c3e764bd5756578e06b8b1f42f6fe4d6fcecb962ebd7c7ac922740f445820a
font_01_sfnt_off0000f878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF878 10612 bytes
SHA-256: 58483f477e82f8396c4038dba6e089c93a8af8e161e2300bf9b14b3aeb3ffe9b