Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc65c37be3f0cd7…

MALICIOUS

PDF

66.7 KB Created: 2020-12-17 03:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fa8225f4a09ffac7f961d37f6e65cb6a SHA-1: 0fbf4a6d2808bc6b5f5ab3498a19840efd200506 SHA-256: ccc65c37be3f0cd7048737dfd2160cff084575f460c76fcc2d24e3af53a153ad
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, identified by ClamAV and ML classifiers as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'Poulan chainsaw manual'. The presence of an external URI points towards an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

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://traffset.ru/strik?utm_term=poulan+chainsaw+manual PDF link annotation
    • https://sazigusejif.weebly.com/uploads/1/3/4/7/134771803/tunafu_sodajafuged_wefimaduligo_jexup.pdfIn PDF document text
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/7009584.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/tubukeganuji/togajawajejonefonojudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e10682b-d647-4575-a76c-c8bff7be7fee/el_jabon_rey_tiene_sal.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/basic_punctuation_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/74631744410.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/brainfish_chess_engine_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/zubafiserusejuraz.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_off0000c873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC873 5036 bytes
SHA-256: 6181acce94b385ea50d1edde02f61cd9e473946c1eb5c99e87e3c337ddff9dfd
font_01_sfnt_off0000d97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 10944 bytes
SHA-256: f4324f4517a2187c03731617b23125aafccea62375b0a476e65c387b547931bd

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