Malicious PDF — malware analysis report

Static analysis result for SHA-256 76dd224709f956f6…

MALICIOUS

PDF

75.2 KB Created: 2021-01-04 22:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e0af4c23b9a9b822267215c889a3bac2 SHA-1: 902d7e0057d0624e4f8098864368bf97dbe321b1 SHA-256: 76dd224709f956f682d42b466c8ab622e449d8839c9f9d15f6e636ecee12ada7
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for malicious redirector links, specifically pointing to 'https://gettraff.ru/aws?utm_term=notice+to+quit+form'. The document body, though heavily obfuscated, suggests a lure related to a 'notice to quit form'. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a phishing or trojanized document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?utm_term=notice+to+quit+form In PDF document text
    • https://cdn.sqhk.co/riwutosax/hbJIhfA/6284438254.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/29938987707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d688a4a-a544-4b6e-bee9-e6c057d56959/47707104283.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/53910270811.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/bawinametuwevuxar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f51911d9-9b35-4b4e-9dd0-1452a5bc5012/ronovevasekosazov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c140390e-282c-4d53-a43a-47b59b7d695a/fapeposo.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/dr_seuss_characters_fish.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/serovetewezizadu.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/dexaxoliwopimefel.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_off0000e9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 4700 bytes
SHA-256: 7d354395c4e9064414e727985b16eeeb83d993ab5e14ce5a8dab304a294dba2a
font_01_sfnt_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 11428 bytes
SHA-256: 85c42fc138fd29ca1e34c245895086d554c71fc876c003a0187e29ca56c5421b