Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e091dff3000b167…

MALICIOUS

PDF

133.3 KB Created: 2020-12-25 12:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5d28803471a28ee54eb2df0a029b2c6 SHA-1: 756d87f069b669a30cd461969e8fd37a567eeac6 SHA-256: 2e091dff3000b167e5a5b23df74e14544ee3df4513d7402a86fdc2bd0cba3315
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://traffmen.ru/123?utm_term=dna+mismatch+repair+cancer'. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the phishing and redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/123?utm_term=dna+mismatch+repair+cancer
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/4102594.pdf
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/xekumewizew.pdf
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/44c0f1ea2dc34.pdf
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/mivelogitaromumonedo.pdf
    • https://mijebekebune.weebly.com/uploads/1/3/4/0/134017127/fcfc418118.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/544c11ab-ace2-4cfd-9732-d0dc68f49026/the_ultimate_emergency_medicine_guid.pdf
    • https://s3.amazonaws.com/xanebavifamopez/sesegabusijenujezebiline.pdf
    • https://s3.amazonaws.com/xeroguru/absorbable_iron_form.pdf
    • https://uploads.strikinglycdn.com/files/95e4f222-4baa-471a-b486-cc71b6f64aaa/mr_riley_worked_with_drink_taken.pdf
    • https://uploads.strikinglycdn.com/files/2119d012-f690-422a-ba29-4db73807af3a/fulivapetipig.pdf
    • https://uploads.strikinglycdn.com/files/eac66bfe-90a0-46e0-a05a-00e2c55cf820/body_massage_machine_walmart.pdf
    • https://uploads.strikinglycdn.com/files/e032a383-72c7-47a0-afb5-f7fb901c2a9a/wezimumogosopo.pdf
    • https://uploads.strikinglycdn.com/files/fc1b6496-3489-4116-a304-fc8eeaa914af/60307659945.pdf
    • https://uploads.strikinglycdn.com/files/10fd747e-a429-4bb1-ac6d-f056ce55c485/nsda_nationals_2020_tabroom.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_off0001caf1.bin
8d0b18911042ff9e70ee0e187f094a6f94614b6d7c38e157448b7c82a629273b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAF1 5140 bytes
font_01_sfnt_off0001dc4b.bin
cc4afc370752863b5f8aa31315f7092ec8012b0375cc086dd7477be02728a763
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC4B 14056 bytes