Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f19fe27b23af85…

MALICIOUS

PDF

74.9 KB Created: 2021-03-19 18:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33af44b750d26cbb50572a525ca4b572 SHA-1: f2dafbfbab7c6bf6fe4cd824717a14a1ddbbe725 SHA-256: c9f19fe27b23af85a6be668fa5a0f2c232f4b5f0af30f52a6144ff431577aa3d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to educational content, which is a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=rectangles+squares+and+rhombi+worksheet
    • http://kewotij.mypressonline.com/what_is_dual_employment_law_in_india.pdf
    • https://cdn.sqhk.co/sozodumupof/dvr3hhd/pet_shop_master_rio_pequeno.pdf
    • https://cdn.sqhk.co/supekokabe/iYgDIge/pull_apart_bread_with_butterscotch_pudding.pdf
    • http://xesapuwax.mywebcommunity.org/42582564884.pdf
    • http://xibiselid.medianewsonline.com/63281681117.pdf
    • http://twenty-promo2020.ru/sex_and_the_city_on_netflixakqh2.pdf
    • https://cdn.sqhk.co/doxowite/gjjdibK/3643030047.pdf
    • http://erogan-encolumbia.site/mopezinazobawufa792tp.pdf
    • http://betijeduw.getenjoyment.net/dewalt_drill_bits_at_lowes.pdf
    • https://cdn.sqhk.co/bozutebux/heDihM9/34866702601.pdf
    • http://girlsbeach.space/trader_vic_s_bartender_s_guide_1947srhyr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_674acd1b8fe146c99c76471f6488d7c4.pdf?index=true
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_d41ca94458e94b4cae64613bcbf2ea19.pdf?index=true
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_bc024582a3d34607afeb65f9d76dc203.pdf?index=true
    • https://uploads.strikinglycdn.com/files/02b01c2c-c37c-413d-857a-78acb42f47f1/rimito.pdf
    • http://tizeruxabono.onlinewebshop.net/hurt_feeling_report_funny.pdf
    • https://uploads.strikinglycdn.com/files/9b280f8b-55e9-4818-8d1d-b7b290bc5662/square_d_pressure_switch_adjustment_air_compressor.pdf
    • https://uploads.strikinglycdn.com/files/d1e46a66-ef02-4594-aa0f-6185b2dc78f3/47910682047.pdf
    • https://uploads.strikinglycdn.com/files/5a80b31e-dcd2-4f96-a9e4-200986b66449/nijamekom.pdf
    • https://uploads.strikinglycdn.com/files/605d7065-83ca-4644-a860-6ee2f3bedbc2/76481598995.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_off0000e43e.bin
0fd430efeb66dccff00ebbe0991f3574acd1a15e24f6e293547e31c056aaa703		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE43E 5780 bytes
font_01_sfnt_off0000f7c9.bin
1c44a39ee0dc0b0e2ad5a544eef46d5a79c72af3185d7ec3e07daeba83df6eb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 11236 bytes

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