Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf1f0cd2a8dfc28…

MALICIOUS

PDF

77.9 KB Created: 2020-12-09 11:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 152bae915a99c1bc1cdccb626635181a SHA-1: 147d1a4df09bac98e61dd204497c5e092273ed57 SHA-256: abf1f0cd2a8dfc2816822207a61ef52968655cdcb831ef87436334b69500b491
222 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru', which is also listed as an IOC. The document body, though heavily obfuscated, contains references to 'Epson workforce pro wf-4630 driver', suggesting a lure for a driver download. The presence of numerous external PDF links, including one to 's3.amazonaws.com/mijedusovineti/mewewawilajatafi.pdf', indicates a link farm used for SEO poisoning or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=epson+workforce+pro+wf-4630+driver In PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/wixigasovigemoximete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f9f6cf06aae9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fa4236e4ec4f.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/7259215.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/mijedusovineti/mewewawilajatafi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe25805147b14804fc4822/1606296960901/painting_estimate_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55f80bdb33045eee00a06/t/5fce191433187724c4193b08/1607342357889/35765765296.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/rekemefukex.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/rixixo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf42e6a371610b876ac5b/1606218817162/clash_of_clans_christmas_trees_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b59f9ea50d4120a35c7b/t/5fcd07c71e1a4d7de12e9483/1607272391048/slime_boss_mod_for_minecraft_pe_mcpedl.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/rowowe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a3e840f1034a5cc929d3/t/5fd003d310495c0ba9169aa6/1607467989114/digimon_virtual_pet_2020.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD200 2856 bytes
SHA-256: 4d00d9a42b8c0a6281c6f91ecd2d6619cfd6d2fee89e9d65d4cff6ecb559f56b
font_01_sfnt_off0000dc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2A 5368 bytes
SHA-256: 57188efb8e15236132f564af8b8e315b5b051348ccb9b21ae78f0d90316a853f
font_02_sfnt_off0000ee94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE94 14608 bytes
SHA-256: c519615ed1999b4fa8cf4ece6c2e3b15473971cee456b3b739df3bf1e7880397
font_03_sfnt_off00011bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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