Malicious PDF — malware analysis report

Static analysis result for SHA-256 6021d2beed507398…

MALICIOUS

PDF

62.0 KB Created: 2020-12-16 14:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8645c6e50c36db818c53b5e211d94aca SHA-1: 00e142619fde9388acd332883caa5534437e74b0 SHA-256: 6021d2beed507398674b3788e5080577442dc6ebbd17ff98b2fbe3400ac096af
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high-confidence ML classification. The embedded URL 'https://traffmen.ru/123?utm_term=apk+format+sd+card' is identified as a malicious redirector. While no scripts were explicitly extracted, the nature of the malicious link suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=apk+format+sd+card In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424010/normal_5fa3c259c4018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f8ab547e749a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476301/normal_5fb8ca60dbc6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_5fd7bffebd026.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420776/normal_5fd03919111a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379236/normal_5fba1216c49e7.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
    • https://s3.amazonaws.com/zuses/ijcai_2020_important_dates.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1520988c99b6d37aa082c/t/5fcb08b79d29b56e4dfaff09/1607141560305/karaoke_online_sing_record.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8eda9bc-373b-4500-9ce6-7faec27f4b8c/boss_slayer_2_hacked_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/nigakabozudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c958643-0af2-4dcd-9c1a-666b5bed770c/1672122764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0dfd11c-035c-4571-aad2-a2e07485527d/aperturas_de_ajedrez_para_principiantes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABCC 4840 bytes
SHA-256: 495e130a5ce715899d18afaa8604e48e4d2cce12610973d4b812c1306bb57175
font_01_sfnt_off0000bc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC31 9776 bytes
SHA-256: 7db74fdf95fb7e78b98ca2e607ad307943538a4b74d4ca3855e9fbd2992e71c1
font_02_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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