Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2734cce1db731ac…

MALICIOUS

PDF

77.2 KB Created: 2021-04-03 11:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ab54defba83a05e53d16324c520bbfb SHA-1: d8b3124b713e0cd0222ef51e728e08338c2812cc SHA-256: f2734cce1db731ac6e9706687988c610dbe8316ac209452177a698e33b4a660a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit the user's trust through a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/123?utm_term=ajahn+brahm+ksi%25C4%2585%25C5%25BCki+pdf
    • https://cdn-cms.f-static.net/uploads/4502248/normal_5fd3771371b91.pdf
    • https://cdn.sqhk.co/ramojezi/idNNCkG/28893680686.pdf
    • https://cdn.sqhk.co/tabuguran/aheS3jd/char-_broil_kamander_charcoal_bbq_black.pdf
    • http://jenuxijaf.mygamesonline.org/base64_string_to_php.pdf
    • http://piriveva.scienceontheweb.net/78232782428.pdf
    • http://momarivido.mypressonline.com/moruwuwalomuzuro.pdf
    • https://cdn.sqhk.co/savunowudob/1oibtgi/kingdom_adventurers_guide.pdf
    • http://gewusoluxul.scienceontheweb.net/npt_vs_bsp_thread_chart.pdf
    • https://cdn-cms.f-static.net/uploads/4424682/normal_603eff70492d2.pdf
    • https://static.s123-cdn-static.com/uploads/4487206/normal_5fdf4be60abc2.pdf
    • http://modezewop.mygamesonline.org/vegan_diet_benefits.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/84016a0b-e001-4e2e-867a-0b8e7b97f415/85770146835.pdf
    • https://s3.amazonaws.com/daxemo/reaccion_de_combustion_etano.pdf
    • https://uploads.strikinglycdn.com/files/eb45142d-a529-40fc-981f-483f0c8a9eaf/how_to_get_3d_warehouse_on_sketchup_online.pdf
    • https://s3.amazonaws.com/zuses/worisezaxij.pdf
    • https://s3.amazonaws.com/jofunozuzof/xiwisawuz.pdf
    • https://s3.amazonaws.com/lemerisinivum/certificate_of_appreciation_format.pdf
    • https://s3.amazonaws.com/vapelurowar/25413050294.pdf
    • https://uploads.strikinglycdn.com/files/bcac319d-5e80-4edd-8367-869af7f80ab2/metal_gear_solid_3_subsistence_limited_edition_ps2.pdf
    • https://uploads.strikinglycdn.com/files/69ffa6ce-07ab-404e-af27-fb6d4dae7ba7/78477614225.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_off0000ee2d.bin
8fd24f9c66999c23337b5d7bbf19ca761f3eeaefefd027b0626e6ab14ef1abb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 5852 bytes
font_01_sfnt_off00010159.bin
5e2d3af342db5b2dff622ad0e4f136268cd1f4534cb0a91e75ff2cfe5f72affd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 11536 bytes