Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b7aa69823102b0…

MALICIOUS

PDF

71.6 KB Created: 2021-03-17 10:14:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06845c44ee235f35fbbfe525cbbbf4bc SHA-1: 689c1996da25ab16ba50bf1b377f315937c6f173 SHA-256: a2b7aa69823102b0dc343aa5d5b085e72792f93f7812fe168de502e46f252cd6
96 Risk Score

Malware Insights

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

The sample was classified as malicious by ML and ClamAV, with heuristics indicating the presence of external URIs within the PDF. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of malicious intent, likely involving a drive-by download or redirection 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://zajinet.ru/wix?keyword=tablet+weaving+kit
    • https://cdn.sqhk.co/zivuputid/Mr8jjhZ/28648069841.pdf
    • https://cdn.sqhk.co/vuvesanap/bdReWXo/fenizosubafolopeti.pdf
    • https://static.s123-cdn-static.com/uploads/4419623/normal_6009a10039fcd.pdf
    • https://cdn.sqhk.co/rodisukipi/f7Wgkjh/drag_battle_racing_mod_apk_revdl.pdf
    • http://trening-ekaterinodar.ru/vidmate_app_apkmonk22idr.pdf
    • https://cdn.sqhk.co/jebozibiru/XBzjkhf/samsung_xcover_4s_test.pdf
    • https://cdn-cms.f-static.net/uploads/4387933/normal_60426e554536c.pdf
    • https://cdn.sqhk.co/susiwebuvowo/Cgdijii/shiva_nuts-_bolts_hardware_hubli_karnataka.pdf
    • https://cdn.sqhk.co/bedimiwojam/eha5hd6/12939903270.pdf
    • https://cdn.sqhk.co/lorotukogof/gcvbJgi/masijo.pdf
    • https://static.s123-cdn-static.com/uploads/4451565/normal_5fe23d626b204.pdf
    • https://cdn.sqhk.co/numisezopo/p9KHlBa/87696724424.pdf
    • http://cabinetshub.xyz/89047426774p5dlp.pdf
    • https://cdn-cms.f-static.net/uploads/4503214/normal_6049af225675a.pdf
    • https://cdn.sqhk.co/nulegudup/qhTja33/ocoee_florida_demographics.pdf
    • https://cdn.sqhk.co/tevimuwijile/g7Bu2ST/8870780474.pdf
    • https://cdn.sqhk.co/salobosemiv/idcjhdJ/does_screen_time_include_apple_tv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c5b2ea43-97f4-40c5-9e9d-088afd3836d8/strangers_on_a_train_characters.pdf
    • https://uploads.strikinglycdn.com/files/2d118781-caac-4e23-ae46-a00aec3b74dc/dazeboxetapimirujusug.pdf
    • https://uploads.strikinglycdn.com/files/939f11d3-375a-4272-b051-cd55f8874a07/david_deangelo_mastery.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_off0000d8a3.bin
e8b871e11d51e9fed7b811bf3470b7983ec0883928530d2b55245fa2f25424c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 4884 bytes
font_01_sfnt_off0000e974.bin
dd547aa20c22f668785d1c4f76e8cddbf15316c2c1b50be08b6345a464a818d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE974 12084 bytes