Malicious PDF — malware analysis report

Static analysis result for SHA-256 c617585136120034…

MALICIOUS

PDF

78.5 KB Created: 2021-06-01 16:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5980b45f6488d7228d9bfa25786a3402 SHA-1: eb12c091db9806fa18a274703f50ec7fd9d735f2 SHA-256: c61758513612003446ac1bc3876321087843a33c38da95057f296e633f30457f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a site offering a "free download" of Adobe Photoshop, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for initial access via spearphishing.

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
  • 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://catamma.ru/pbw?utm_term=adobe+photoshop+cs+10+free+download+full+version+for+windows+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408481/normal_60314d7f482c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500432/normal_6000c06a6918a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480745/normal_5fd2d7c5c359c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_603599a5b0eb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465018/normal_6002eddc1b778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413108/normal_6050ee31026b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5fd2333cb98ae.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/6d6364e3-7e83-4579-af3d-acdd4f0e1b96/honda_gcv160_carburetor_bowl_gasket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21ffaae-2473-45d5-97d5-72bf9d0d4f5a/75735621326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9778c152-173f-4639-af42-f9583693ca69/what_happens_in_the_end_of_after_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa74c7d3-8da0-4412-a3de-813bde4fd998/nozotuwi.pdfIn PDF document text
    • http://mumubib.pbworks.com/w/file/fetch/144413343/38456949116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b405262-d586-4c2c-a834-e23ffc36d6e0/2005_sportster_1200_repair_manual.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144452163/gikurevajelosemileka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ad954e-d309-47b6-95a8-4bc82fcdc6f2/diary_of_a_wimpy_kid_characters_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd26d8da-b945-42f0-b0d5-c27c6026a1b7/teradapepovobifigewonikax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9087931c-9414-42d3-a3c7-1b947f77e12c/boss_gt_1000_price_in_malaysia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c106aa5e-2a04-4990-ae96-177a02ac749b/dell_inspiron_17_5000_battery_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a4f013-55ed-4ca4-a9fd-c4af3b714903/blockman_go_beta_new_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144383f7-f7e8-4ad0-ac33-29573aa03412/5739456612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3534f6-325a-4f7b-93f7-d4f8635124b3/vocabulary_workshop_level_a_answer_key_unit_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f933b49-74c8-4ed6-ab2a-50968445edc1/32017465011.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_off0000f4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BB 5796 bytes
SHA-256: 5829535060204e5fbed405eaaf733dfc62a094b05d77f0c693ab9fcaa10d6268
font_01_sfnt_off00010897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10897 10420 bytes
SHA-256: 38d135635dfc153d64c80c2397f0f04f96d2c211ef1cc5cf20363105192e997e

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