Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d49a17bd932a7b…

MALICIOUS

PDF

82.9 KB Created: 2021-04-06 14:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 00eac75a9aabc6d61a4468ec48d5db66 SHA-1: 217ed378cbbafefc1a262f9f6355e39cc39618d3 SHA-256: d3d49a17bd932a7bc3c08300a5a147fd386bc37e5ec2f1f8719e8ec8abb1dd01
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as legitimate documents, indicating a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/award?keyword=vehicle+cleaning+checklist+pdf PDF link annotation
    • https://cdn.sqhk.co/zapusukajev/ichfTyF/epson_iprint_windows_10_mobile.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/navy_blue_jacket_manual_online.pdfIn PDF document text
    • http://tinipen.medianewsonline.com/motafefaw.pdfIn PDF document text
    • https://cdn.sqhk.co/numisezopo/hGq3ihY/geometric_tattoo_designs.pdfIn PDF document text
    • http://dobilarujokux.sportsontheweb.net/batman_death_in_the_family_online_sa_prevodom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wekujugom.epizy.com/21973053480.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/bombsquad_pro_apk_1._4._146.pdfIn PDF document text
    • http://finabupotokuko.epizy.com/celebrity_voice_changer_cracked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/who_sings_memories_bring_back_memories_bring_back.pdfIn PDF document text
    • https://37cc4ef3-276f-49d0-84f3-8bc08bbde6a9.filesusr.com/ugd/e4a5d4_34282556eebe4eaf9f85c9c4f18f12a1.pdf?index=trueIn PDF document text
    • http://pupekulojam.epizy.com/fudenorutilusede.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/meponoxuweb.pdfIn PDF document text
    • http://bixowufufo.rf.gd/tebuxizila.pdfIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_076d3554908844b6b90d60c0f243082c.pdf?index=trueIn PDF document text
    • http://bojibag.epizy.com/clinical_biochemistry_for_medical_students.pdfIn PDF document text
    • http://jabasutazupalun.rf.gd/78737625245.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/up_anganwadi_form_date.pdfIn PDF document text
    • https://536432c6-7160-4795-b32c-faef63afc1c8.filesusr.com/ugd/5e2347_50772d08e9354d5bb7197fbdc55a402b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/nexamudoridefavegepa.pdfIn PDF document text
    • http://dudasuz.epizy.com/28656169188.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_df06aa133b854142981d1889a70ba2b5.pdf?index=trueIn PDF document text
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_fca52f1b86ce4c00b4f804cc8e910341.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 5028 bytes
SHA-256: 41f7e01a4e8adb14db09d69bdfe7529c0e34717ea56f0d7f1178f9f292147944
font_01_sfnt_off0001096c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096C 11576 bytes
SHA-256: 4d67fe067c2b2bdf703ae8a9e8521238486b54065bd72461d9dc20a44541f532
font_02_sfnt_off00013034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13034 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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