Malicious PDF — malware analysis report

Static analysis result for SHA-256 f327925d0bdc1cb2…

MALICIOUS

PDF

77.5 KB Created: 2021-03-19 18:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 867fb791e80219a3f45d3ba3269e2364 SHA-1: 19e1e3afc6970eb947c30d5df10d197e012492ac SHA-256: f327925d0bdc1cb28c8640fb0a98e9ace24f711fad0e4d4fdf6d1fff9c3b94be
126 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains multiple embedded URLs, including one pointing to 'https://ponafet.ru/award?keyword=vector+calculus+pdf+download', suggesting a lure for users seeking specific documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for malicious links, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/award?keyword=vector+calculus+pdf+download PDF link annotation
    • http://quinzsy-studio.design/grand_canyon_village_weather_reportid3sh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_603e49b8b633f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460968/normal_6004145ee8a51.pdfIn PDF document text
    • http://damvglaz6.xyz/public_administration_masters_onlineyjouk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_60287b3a44e94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494891/normal_5ffab9462dce1.pdfIn PDF document text
    • http://ribavid.medianewsonline.com/vehicle_bill_of_sale_massachusetts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_60021b52c8116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391642/normal_5ff413125f492.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/gasobeziwonepumipidavet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377706/normal_5ffff62f49247.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xekabotiwuker.atwebpages.com/wenepedoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ed0db0c-28b2-454a-b706-7620d80329fb/bram_stokers_dracula_full_movie_download_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233ec8ac-4bfa-4028-88e7-0a37c8bdc8d1/how_to_write_an_essay_about_themes_in_a_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84ea338-5992-4a99-b51b-5fcf668ba082/lutapade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a73c16f-0143-4ff6-9998-04917c775b9b/50109574671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4df8ed1-f2d1-4ac9-8a2e-66a3cc623e57/what_is_the_difference_between_diono_radian_3rxt_and_3rx.pdfIn PDF document text
    • http://wesatume.atwebpages.com/mcgraw_hill_dictionary_of_american_slang_and_colloquial_expressions.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D5 5040 bytes
SHA-256: 365e5a1737e46b06fa0e622b609e251d2beb10a36ee5d7ae6fc156234ed648ec
font_01_sfnt_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 10756 bytes
SHA-256: 7a9cfc4e8f4d6e43796319bc533f028fe632104f175e7b534e4c8ce0bce26fe6
font_02_sfnt_off00011b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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