PDF malware analysis — malicious · 8526650321efc694

MALICIOUS

PDF

79.0 KB Created: 2021-07-13 16:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 8afe341c7d4da7839482e180b27d4aad SHA-1: a71f3135f922c0e54810f895209f5fb86a1c46cb SHA-256: 8526650321efc69492c0946356723db4da42919289b1b297a7524269d461650c

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'huntic.ru', which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of an external URI and the detection signatures suggest a phishing attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9478

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://huntic.ru/square?utm_term=if+your+urine+has+strong+odor
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed186efc46f1629a01aba1/1626151022741/1746204177.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e881ed3936280ca0274f9e/1625850349418/76245589501.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e95ebbf229ba2ea838cedf/1625906875891/8415545030.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed450af8b4e244e4fc9791/1626162443036/inside_out_cast_riley.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e768e6bd1231e604ea11/1625876328117/4_letter_words_with_world.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e76f2b046c3d00506e9ab7/1625780012337/maths_olympiad_for_class_3_worksheets_free_download.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed8d0ddacdbe35d62b9b2e/1626180877804/voguwedor.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e94ea6c14ff043cd5e45f7/1625902758892/31914294209.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d4e3.bin` `de04a0f96c2e5c4ad670f2e34537c960bb5b333d47e0f3483e809e18067cb1ce`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4E3	16304 bytes
`font_01_sfnt_off0000ff5a.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF5A	16792 bytes
`font_02_sfnt_off00011771.bin` `c2bb6a332061926a757e80b83916331450843d4ef0304feb724e9b6c302e1fe0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11771	10752 bytes

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