Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0c51cb1006b1d8…

MALICIOUS

PDF

61.7 KB Created: 2020-11-25 09:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0e87ab6252c64ff33db0e65f1a881c42 SHA-1: cd421e5f84434d2226eb51b3c47e61510fdf5d18 SHA-256: 0b0c51cb1006b1d8c09ff3dd5773bbaa80ea20641f49845e32986d3d96f04442
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution campaign. The document body, though heavily obfuscated, suggests a lure related to a 'study guide'. No scripts were extracted, but the presence of an external URI and the overall classification strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=food+inc+study+guide PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fb5acc4-870c-44c9-a131-be6e28bfdec6/madison_sd_google_maps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2af5e0c8-b662-43de-946c-5ad886c0a88d/zozad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40d3cc5-60d1-4f8b-9c75-0188d7d9ff30/five_nations.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/cub_cadet_rzt_50_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/cardinal_directions_worksheets_for_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c2160e-cc09-4fb1-8731-553a5b3c0ecb/steven_universe_s05e27.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/xefetoloviluluso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9d153f3-671f-46c7-a799-5760f6c0eef4/26465288092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf768554-099c-4659-ae50-c63b8e2fc48e/vocalign_pro_4_vst_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a428b1-7c45-4805-9ee5-e6dea11ec2ae/maw_of_the_ice_dragon.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/eztv_proxy_unblock_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b44a73e-944f-4561-9258-4088ddd4bd65/mexovemekovux.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/hungry_shark_evolution_free_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/birthday_naa_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/dslr_camera_free_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dacc2b1-943e-4e70-8f0a-7e1e682cdc36/12583034934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e11209-f6da-4a4d-b600-1f74c8f525df/rosozokopejanijog.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_off0000b666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB666 4824 bytes
SHA-256: ecd2dfe7775643d5ab480a76d6430c09db7a0ec6a4d2b6980d8a91b38b3f9588
font_01_sfnt_off0000c6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F6 10196 bytes
SHA-256: 94fe373f360ef065aa4a37fddbb99e5e24d014a9a714786adfe01232abcfb182

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