Malicious PDF — malware analysis report

Static analysis result for SHA-256 31782a963045877d…

MALICIOUS

PDF

64.5 KB Created: 2020-12-17 20:01:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6224d6fb9e96b26c53427b34846276f1 SHA-1: 72cec7a5796614675cf3752b44755461001b6e79 SHA-256: 31782a963045877d493882ae0b1382a66badbbf90074de19668edfcbf0f7d378
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains text that suggests a lure related to 'amazon'. No scripts were extracted, but the presence of an external URI and the nature of the detection suggest it's designed to redirect users to a malicious site.

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
  • 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://trafffi.ru/123?utm_term=super+crazy+loom+amazon PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b4ad15-1586-4cc9-aff6-71c84950d979/42089047457.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/95536151494.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/6730302127.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/19988436581.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/4007889913.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/hungry_dragon_mod_apk_gems.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4eeaca5bc066edfbf657c/t/5fcdbe3624c49707d33ea6d8/1607319096064/22780792131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a0c64ac-4536-4968-b3d2-98cb2e8cc61c/83858936143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb9925b-03a2-441e-b3ec-f2b43d501124/66037353995.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/speed_test_slower_than_upload.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/92955182005.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/sonukiwuzu.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_off0000bc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC39 5156 bytes
SHA-256: 1e3915b90c7f7079c2c6c19c6a9a0529d720f8525b2847a4a2657b697408ece9
font_01_sfnt_off0000cdc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC4 12360 bytes
SHA-256: 91404714f599a85082a16f3f43b5fe55f607da2819591cad15e520159351fb1c