Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6175c91a20c213d…

MALICIOUS

PDF

80.7 KB Created: 2020-11-16 21:02:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3db856a8bbe15f562c18fbcc404f5540 SHA-1: 97c5a519a8aa11d3e98ee24b05f43b0cbf93798e SHA-256: f6175c91a20c213d52ebe1b7c18bd0ee54403388194f53651ef67008f48043dc
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by a machine learning classifier and ClamAV. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Ap stats 2017 free response answers question 5'. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=ap+stats+2017+free+response+answers+question+5
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5fa1eae398bdd.pdf
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5fad6f06c48f4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/padoragog/free_electrical_panel_schedule_template.pdf
    • https://s3.amazonaws.com/temujonuwu/fitexogazunexawe.pdf
    • https://uploads.strikinglycdn.com/files/b34466e2-58bf-40f8-93bb-985d56cbd2c7/28669460933.pdf
    • https://s3.amazonaws.com/kasuwevovog/calendario_mundial_rusia_2018_argentina.pdf
    • https://s3.amazonaws.com/suximawo/que_significa_offset_en_espanol.pdf
    • https://uploads.strikinglycdn.com/files/0de563d8-2ffd-4c9f-939b-ba59879d7736/subway_surf_money_glitch.pdf
    • https://uploads.strikinglycdn.com/files/d2dc7b77-b7d3-40e4-b213-a23042e98c6a/fajirusobewezamopuka.pdf
    • https://s3.amazonaws.com/somamere/comida_tradicional_mexicana.pdf
    • https://uploads.strikinglycdn.com/files/4765aba2-f338-4ef4-87f3-ea50d788e9e9/ap_physics_1_prep_book.pdf
    • https://uploads.strikinglycdn.com/files/1aedfd71-b761-4535-af77-deaf04b3e023/zaxowerulumizilepizanig.pdf
    • https://s3.amazonaws.com/muwemivumazulax/18366473893.pdf
    • https://uploads.strikinglycdn.com/files/559f82d9-06a2-44f7-b09e-3dcf117082f3/naruto_impact_save_data.pdf
    • https://s3.amazonaws.com/vedexajawo/prism_tv_channel_guide.pdf
    • https://s3.amazonaws.com/memul/30185940968.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d732.bin
c5531e607b2727359029c234299b8b707b6963c246a996185ef2a10cff98a451		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 5600 bytes
font_01_sfnt_off0000ea78.bin
786d6ea131373f9fb00e3a4962b027b9e39e79e959e378ea94620f2bbdfa7870		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 3968 bytes
font_02_sfnt_off0000f9c0.bin
c462e46daced646f41b12dda24cb21dc3e3877c8928193657cb3e7dd2351d1c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 11324 bytes
font_03_sfnt_off00012088.bin
149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12088 16036 bytes

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