Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98f1472532db161…

MALICIOUS

PDF

72.5 KB Created: 2020-12-18 05:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b45d94f4833f67c0d8a39e1267c66c67 SHA-1: 3245d2eb4e32780c30a7fe9bc225595178329862 SHA-256: e98f1472532db1611610cd149ea0159b128cfef3858bef0d67a6e55bb3cfdbdd
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains including trafftec.ru and pixabetamomu.weebly.com. ClamAV and ML classifiers also flagged the PDF as malicious, specifically as a phishing trojan. The embedded links likely serve as a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=impossible+test+3+answers+fish+food PDF link annotation
    • https://pixabetamomu.weebly.com/uploads/1/3/1/0/131070001/fd0e2e58c6.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/revuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_5fa94f6826b9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5f20fa04221c7117dd56/1606377248892/67848988774.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/42176975354.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36a1c3dfdd95b60e51b81/t/5fcebd1099b6a7582b4f51c1/1607384336555/19461601411.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc67f67ab79f442f2500a09/t/5fd63b655488895576a61988/1607875429976/32768014917.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc597dfc6229360ecccd2a7/t/5fd1eb3efec2791e310a1767/1607592767130/snake_xenzia_classic_game_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/matamegezakodagipibuwufa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd05262c6de34c7a39f500/1606223143428/anatomy_drawing_books_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/irony_worksheet_doc.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_off0000dfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB1 5616 bytes
SHA-256: 0604fb28cac013845b7b74d6b49f4c2d157db32acf23e6c81269e09b97cb59bb
font_01_sfnt_off0000f2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A6 10116 bytes
SHA-256: 4c2811b0d69e8973f3d5bb67788f9ec51fe91ba42194d07a358f88af224dbc55

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