Malicious PDF — malware analysis report

Static analysis result for SHA-256 29617d3079599d28…

MALICIOUS

PDF

73.6 KB Created: 2020-12-21 21:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e73e9dbc29213e18959fc265068d65cd SHA-1: c9ec94a6f784988e7475a04f2da4266207c9c39a SHA-256: 29617d3079599d28833ab8379acfbe06f48fa2bd7c4e69790fd70da2eebb4a6f
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffe.ru/strik?utm_term=%25D1%2582%25D1%2583%25D0%25BC%25D0%25B0%25D0%25BD%25D1%258B+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25B1%25D0%25B5%25D1%2581%25D0%25BF%25D0%25BB%25D0%25B0%25D1%2582%25D0%25BD%25D0%25BE
    • https://cdn-cms.f-static.net/uploads/4410015/normal_5f943abfb0e0a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9e640592-eadd-4782-a9f5-c23ba3b1b1a9/rabbi_inni_lima_anzalta_ilayya_min_k.pdf
    • https://s3.amazonaws.com/mejawiwomak/29622205173.pdf
    • https://s3.amazonaws.com/dowadotiju/five_tv_guide.pdf
    • https://s3.amazonaws.com/zarevizebi/jio_mobile_video_calling.pdf
    • https://s3.amazonaws.com/fowonaxul/77721017111.pdf
    • https://uploads.strikinglycdn.com/files/816ed12c-5fef-4515-ad7b-c403d81ca27e/ap_statistics_simulation_worksheet_answers.pdf
    • https://s3.amazonaws.com/fosagoba/bjs_sheet_cake_themes.pdf
    • https://s3.amazonaws.com/jitimesolagun/corded_phone_with_answer_machine.pdf
    • https://s3.amazonaws.com/rupatojuko/takeuchi_tb135_repair_manual.pdf
    • https://s3.amazonaws.com/besafefaf/segemajutijubamilo.pdf
    • https://s3.amazonaws.com/wefadep/inductive_bible_study_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/7c11ed54-a5c5-4643-ae76-c2dbc1f38019/nerf_double_strike_mod_guide.pdf
    • https://static1.squarespace.com/static/5fc11ab312facd59ceae2d6e/t/5fd1f576fec2791e310afbf1/1607595383272/55218240578.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ed26.bin
47ab3c34e293c4ed2ebbdb3546221649789b8e9f34986ba64ea12adf4ef96529
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xED26 24024 bytes
font_00_sfnt_off0000b0e8.bin
f5ccb43fb41609b4795b6c620af9ae5fdcd6de7e96c9374f0b78a48e78183422
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E8 5632 bytes
font_01_sfnt_off0000c37b.bin
6e41a4c20d1dc23c57ff54bc4dac114f20643782cd58b2aa6a35f95ff11f7c9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC37B 13392 bytes