Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01325237c05f3d9…

MALICIOUS

PDF

76.9 KB Created: 2021-02-28 20:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a6f642c3903476c180274aa066e14e2 SHA-1: 152053d2be9f24a2984414200a74a1d09c969d82 SHA-256: d01325237c05f3d9ec43362d0f8f187dacef1eaa92129d82054eb0fc104f1b84
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL pointing to 'crophysi.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=big+blue+party+speaker
    • http://simultaneously.space/megotuwedewifewinewgoivp.pdf
    • http://bikejesoxatelo.mygamesonline.org/chocolate_black_and_tan_cream_red_miniature_dachshund_puppy_for_sale_nyc.pdf
    • http://betijeduw.getenjoyment.net/30039107829.pdf
    • https://cdn-cms.f-static.net/uploads/4453326/normal_6021e7c8b7c83.pdf
    • http://nijalatol.mypressonline.com/6160_keypad_user_guide.pdf
    • http://zolomakowifop.iblogger.org/sub_zero_built_in_refrigerator_manual.pdf
    • http://wipababotuzuke.iblogger.org/87830620014.pdf
    • https://cdn-cms.f-static.net/uploads/4416125/normal_6011b7bf2352b.pdf
    • http://matawobedopikam.mywebcommunity.org/trolls_dance_song_cant_stop_the_feeling.pdf
    • http://boxberry-24.cc/68667333471lv0bh.pdf
    • https://static.s123-cdn-static.com/uploads/4404124/normal_5fc6d6a2d5633.pdf
    • https://cdn-cms.f-static.net/uploads/4376852/normal_601a56d380c19.pdf
    • https://cdn-cms.f-static.net/uploads/4481520/normal_5fd2a6f3ec5a2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://povumuvepu.epizy.com/how_can_i_update_my_tomtom_one_map_for_free.pdf
    • http://bavotuvezomevi.myartsonline.com/what_is_60_000_in_standard_form.pdf
    • http://bavotuvezomevi.myartsonline.com/34003058405.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed3a.bin
e070f9cabf0262a165c37a3fc47c6c7b2558b89b34125d7ab1805ec8034f141a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED3A 5340 bytes
font_01_sfnt_off0000ff82.bin
a114b7c75357bec161c48f97281f6da54a3c823f34685d6fd3e2cc1272866a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF82 11580 bytes

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