Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2d89f0594801a1…

MALICIOUS

PDF

107.8 KB Created: 2021-07-14 07:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2747e2b161b02a8d1942a25ca713445 SHA-1: 5c2d24221443182cced48a1d7933b9ea5405994f SHA-256: de2d89f0594801a1227eff6b3be5f3a4c1971c750d09718a42ffd35fd42866a5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to 'infrive.ru', which is likely a phishing or malware distribution site. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7457

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/square?utm_term=epstein+barr+and+pots+syndrome
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9561831aaf5e928bc9ec/1626117474143/segalazoluwapoxojunobovi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edc0751f6a9512286cae55/1626194037420/silent_assassin_meaning.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee1c6864675e3b9ddebe14/1626217576457/how_to_change_colour_tone_in_photoshop.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7aec0cf33f708d798423/1626110700239/how_to_find_domain_and_range_of_a_circle.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edb6488525735ba0d41760/1626191432267/best_food_for_heart.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee283f1f51426150cba14f/1626220607907/60431688906.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://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_off000141cd.bin
0bf77a9b0a0fe5fc643eac333b46a8438e602e3fbac3446e443c0ea19354cf35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141CD 18476 bytes
font_01_sfnt_off0001729f.bin
37bfaa5434c168a12947790c27f2e304162793308eeebe78cfd6b9a804e58957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1729F 10744 bytes
font_02_sfnt_off00018b27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B27 16792 bytes

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