Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb4e826dd054dae…

MALICIOUS

PDF

74.0 KB Created: 2020-12-24 22:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a1d2d83bbab770198cbc21652052779a SHA-1: ece833b19a35ab2153bf70e972ba37245f8d1d11 SHA-256: 3eb4e826dd054dae43f4e799f4a30a83bd9a3e69808014ec4cfe2d7f95b15bbd
154 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by multiple heuristics, including a critical alert for a redirector link to 'traffking.ru'. The ML classifier also assigned a high probability of maliciousness. The embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=ice+hockey+songs+uk In PDF document text
    • https://cdn.sqhk.co/dupeguwova/fjjijgj/42943253552.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://cdn.sqhk.co/wubumeze/fgcsici/head_soccer_2019_mod_apk_unlimited_money_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f95560b288cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_5f9ed8ccb1f8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_5f9b3fd483031.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/9085281.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/wokevox.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/gigeicd/civil_war_battles_1863_march.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/7363790.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/ganubifirigevi/effortless_english_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/aisi_316l.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_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 4580 bytes
SHA-256: e955b835eef8db201b0117281d50f618767a320698a8fa2359ba18fde00ffb2c
font_01_sfnt_off0000e99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 10404 bytes
SHA-256: c3a0aeb9e0851e4ff45326812c00e9de39a7aca3d3cc477deec8daa5209066e7
font_02_sfnt_off00010d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D45 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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