Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d62bc39e64edbe…

MALICIOUS

PDF

68.3 KB Created: 2021-01-11 17:33:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3eac53dee74b2dc1c70f44813bab234b SHA-1: 9dd47aa7af7491245546c9582dca6cb47b85607f SHA-256: 04d62bc39e64edbe9af101119257d4ad1e6429771d5cde68ff6d36e269e55ec0
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafficel.ru' suggests the document is designed to redirect users to a potentially harmful website. The heuristic 'SE_QR_LURE' indicates the document may instruct users to scan a QR code, a common tactic in phishing campaigns. No scripts were extracted, but the overall structure and heuristics point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://trafficel.ru/aws?utm_term=free+printable+synonym+worksheets+for+1st+grade PDF link annotation
    • https://cdn.sqhk.co/jedugifaxido/gfhgkDN/heart_rate_monitor_not_working_huawei_watch_2.pdfIn PDF document text
    • https://cdn.sqhk.co/molewekane/chjk5Y8/zokiwewi.pdfIn PDF document text
    • https://site-1175927.mozfiles.com/files/1175927/arbonne_30_day_challenge_weight_loss_results.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446500/normal_5fa2623f43818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_5f9969b8b15af.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/1p6DACS/g_stomper_studio_mod_apk_download.pdfIn PDF document text
    • https://site-1207255.mozfiles.com/files/1207255/2077140605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424647/normal_5fa2fa8c29345.pdfIn PDF document text
    • https://site-1166601.mozfiles.com/files/1166601/86798342042.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411717/normal_5fcf19963fd83.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/MGMZhgV/vupuzudilewara.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407788/normal_5fef6b2833b67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDD 5860 bytes
SHA-256: 945e8ca47ccf1532b241c9777120b32609c4363d81355ad49bdc5758ae9c4f0a
font_01_sfnt_off0000dfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC3 10800 bytes
SHA-256: 07c7f6a076e9cd6000f7cc570a1b8ea9716d8cda50fa5f234dad572303e45334

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