Malicious PDF — malware analysis report

Static analysis result for SHA-256 80988247e63de1b3…

MALICIOUS

PDF

66.1 KB Created: 2020-12-23 07:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5cbb738bb91f39dd8dcf33b029d8d68 SHA-1: 170f96bef6ae0901a54ed778bdf888e11e57442c SHA-256: 80988247e63de1b33233612a472ec1eb6f9a63dba43c50ab4c3da6269e9bdfff
154 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 'https://cctraff.ru/strik?utm_term=glasswire+data+usage+monitor+app'. This URL is likely used to redirect the user to a phishing page or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=glasswire+data+usage+monitor+app
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/nuzusum-wevorod-zaguj-zamivor.pdf
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/df4687ce.pdf
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/7a43c40c2.pdf
    • https://gumarifubora.weebly.com/uploads/1/3/4/4/134465571/d3abf275dc5c1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe071a173fb5383b68e3a7/1606289181834/tyrones_unblocked_games_qwop.pdf
    • https://s3.amazonaws.com/lonozote/shakalaka_boom_boom_in_tamil_free.pdf
    • https://s3.amazonaws.com/dosalapasenow/upsc_cms_online_form_2019.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/wajemopusogabolimo.pdf
    • https://s3.amazonaws.com/juzowilipi/73264114581.pdf
    • https://static1.squarespace.com/static/5fde7a645fb7d01a9b07559e/t/5fdf40252da99c28682c4cec/1608466470254/narivuwunajekirovexijina.pdf
    • https://s3.amazonaws.com/gomakobez/subtotals_in_sap_alv_report.pdf
    • https://s3.amazonaws.com/moxekibupuru/65769818773.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ea.bin
809bfee15090fbc628ed7b804d3b94b78988f849b747e9f37dbc90ce772660bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EA 5400 bytes
font_01_sfnt_off0000d74b.bin
cdc74a8bc8d34be99c6987e1d577141ed3c560af2b545f9362839c532b49694d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD74B 10700 bytes