Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57c438204ce4c29…

MALICIOUS

PDF

106.2 KB Created: 2020-12-25 07:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 65ae00be42e287ce97e9da11e3bf5736 SHA-1: 7c0e8d1d5f301a67e505f5f1ba47212cc52f6cf6 SHA-256: c57c438204ce4c29d8e9a047e97baedaf7d3f8561d3c2179d9b91a5ddfb7a099
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 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffine.ru/123?utm_term=utah+gas+tax+increase+2016 In PDF document text
    • https://cdn.sqhk.co/modebopogut/jaheeii/solar_system_3d_simulator_m_i_nh_t.pdfIn PDF document text
    • https://cdn.sqhk.co/lukupupiba/Xihiahg/71102886763.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5144b6db-5601-4792-91b4-b8d13a136a70/leteselukaxidugob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f80bb0-2c40-4367-983f-3a589d4f67ef/fikek.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/troy_bilt_2800_psi_pressure_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e0d2a7-78f8-456f-bf20-1b9087effce9/52278250372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/004821a8-6413-4f96-a4d2-0266ccca0457/97314450927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b14cd8c-94bb-41a1-a3e0-a53c712bf435/trane_xv90_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6034225b-2e76-4469-9f6a-1773b3301bf4/23157779074.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/28283717523.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/blue_devils_2017_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/esoft_accounting_software_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39edf088-159b-42b8-829d-2e6a46dbb139/gutijivijusiwosugila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd6bc83-10a7-4461-93c8-c3f5c7241034/domodasolexawilan.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016d7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16D7A 26352 bytes
SHA-256: cb1abe7e1cb81e9db7e5037ae33f9ce0e514acb8c637e3ed8c044441e43290ac
font_00_sfnt_off000130f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F3 5568 bytes
SHA-256: cd796dff18772e3b273855cc09c0d7af06fb9505a6374c6fcc275c2038015652
font_01_sfnt_off000143ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143ED 12136 bytes
SHA-256: bbc7b29e57cf4763bb7ffba19cbc7277e96dbce7a3497af3953c88915af43503

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