Malicious PDF — malware analysis report

Static analysis result for SHA-256 341683af71123215…

MALICIOUS

PDF

71.6 KB Created: 2020-12-24 01:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a2701d02a324f8743a09ea7d59fb3b1 SHA-1: d4b916b14a232b6c1fc249f1fc9f8a5b057e7142 SHA-256: 341683af7112321530753012dcdc423698f6288f2a03de54a5f305fcc7c83077
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution. No scripts were extracted, but the PDF structure itself contains an external URI that is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=does+she+love+me+text
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pirofopafu/b_n_y_s_full_form.pdf
    • https://uploads.strikinglycdn.com/files/663ea3a5-a866-4ce2-985f-8a2aae588d59/colorado_motorcycle_manual.pdf
    • https://s3.amazonaws.com/tipikaxe/air_pollution_articles_for_students.pdf
    • https://s3.amazonaws.com/wapabefizosumi/91084019510.pdf
    • https://s3.amazonaws.com/samopakamefap/91372128075.pdf
    • https://s3.amazonaws.com/gorajikunobixi/whatsagent_for_whatsapp_apk_free.pdf
    • https://s3.amazonaws.com/takurugilij/gmail_app_for_windows_10_pc.pdf
    • https://s3.amazonaws.com/jeponowon/89572600249.pdf
    • https://s3.amazonaws.com/lekizopiloref/818715109.pdf
    • https://s3.amazonaws.com/pajukovuxetu/4000_x_1250_mm.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c60e.bin
3880e684d81ef37fcd656db95f2d42fa3f47074e1f088d61d71c67f5197f334e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC60E 4748 bytes
font_01_sfnt_off0000d61e.bin
01ce771a66979aa94aa9eafd4e5e202eb55bf0ab2b84ff4083bd4a80bd7e5caf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 11100 bytes
font_02_sfnt_off0000fc4f.bin
fb2ac63fb075d256b5587570191ecec806cb29c29da4ebedfc8653ce907d9040		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4F 16384 bytes

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