Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c86b255e26b6e7…

MALICIOUS

PDF

61.7 KB Created: 2020-12-23 12:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a299828e2380911c7b6988ffdd73adb3 SHA-1: 1348370ec188f3b816f17565fac3095a48db75b2 SHA-256: 71c86b255e26b6e75c1fd1a15a2099bb335ac19df4f1ead7ea1a25e1ddda21d1
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, which is a common tactic for phishing and malware distribution. The embedded content, though heavily obfuscated, appears to be related to a Samsonite product, likely serving as a lure. No scripts were extracted, but the presence of a malicious URL and the ML classifier's high confidence indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=samsonite+bartlett+spinner+24
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/nipifomi.pdf
    • https://jajijonag.weebly.com/uploads/1/3/4/7/134762104/kumuvegamosav.pdf
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/9074411.pdf
    • https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/a2da090c880bf.pdf
    • https://kenumobubedu.weebly.com/uploads/1/3/4/3/134370592/78eb0b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tidigudetefumof/tamil_songs_video_status.pdf
    • https://static1.squarespace.com/static/5fc0d0065e8e827d428d60b5/t/5fc1a6764e98326c024e91bb/1606526590853/dufixo.pdf
    • https://s3.amazonaws.com/tawovojo/15034470016.pdf
    • https://s3.amazonaws.com/fizufapu/100_square_activities_worksheet.pdf
    • https://s3.amazonaws.com/lezopobigeza/69173905969.pdf
    • https://s3.amazonaws.com/lakadutof/jkbose_12th_class_date_sheet_2019_private.pdf
    • https://static1.squarespace.com/static/5fe2b657a4412b31ee78cb00/t/5fe2bc936dd3bd28353dc17c/1608694933095/sarkar_full_movie_tamil_link.pdf
    • https://s3.amazonaws.com/doxifuba/90656332297.pdf
    • https://static1.squarespace.com/static/5fe0158af67c863bcd193198/t/5fe08d695809ae34342ea217/1608551786138/poresaxuzi.pdf
    • https://s3.amazonaws.com/tezude/causative_exercises_advanced.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_off0000b507.bin
418545c90379609ffe2f6f6ee8c87cabbe96516972e098b9af36018be3ab81e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB507 5428 bytes
font_01_sfnt_off0000c760.bin
b655cf208e4f9a5680b441004af1469ed1283facc145d123042cc8a2298e4cdc
pdf-font-stream PDF embedded font (sfnt) at offset 0xC760 10204 bytes