Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d0085c25cae3d8…

MALICIOUS

PDF

82.1 KB Created: 2021-03-29 05:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 11f83dfab12a3a951380fa4bad7b2932 SHA-1: 16acde776663839c17a4dfd7411081592f6bde52 SHA-256: d7d0085c25cae3d85bf9320ebf2466ff86616b0814052728a6a73ede2cdf8482
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though partially corrupted, suggests a lure related to a malfunctioning Samsung washer. The embedded URL points to a suspicious domain, likely serving as a redirect to a malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/strik?utm_term=my+samsung+washer+will+not+turn+on PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462066/normal_60146aab8d53f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451217/normal_5ffc39108a294.pdfIn PDF document text
    • http://dobomasinuraz.iblogger.org/27761611164.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5fc6f1c7a0e42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5fe9f1f738a27.pdfIn PDF document text
    • http://vemasujananexu.22web.org/45220337217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_6013c78b8088b.pdfIn PDF document text
    • http://wokulorumal.iblogger.org/how_to_get_to_menu_on_sanyo_tv_without_remote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7829c06d-6ad5-4605-a555-f3e0871aab44/87506557391.pdfIn PDF document text
    • http://jedasejikiboj.epizy.com/biblia_reina_valera_gratis_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79646bfe-3a2a-4bed-aede-3ed337f14c5b/how_to_determine_volume_of_cylinder_in_gallons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a547f626-b9ba-4afd-a835-58c02b513f1d/why_does_my_top_loading_washing_machine_smell_like_rotten_eggs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/688edbbd-0354-4f30-aef8-b77687d8e116/4644420140.pdfIn PDF document text
    • http://lebekad.rf.gd/artificial_intelligence_for_marketing_practical_applications.pdfIn PDF document text
    • http://zubikezisupudo.rf.gd/diccionario_latin_espaol.pdfIn PDF document text
    • http://mudedomusakovag.epizy.com/dictionary_worksheet.pdfIn PDF document text
    • http://vuzudaru.epizy.com/93595265856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb5b94b-6ee5-44ee-a5c2-890f40560cf7/7125494733.pdfIn PDF document text
    • http://wuvuwipiwizovid.epizy.com/archery_master_3d_unlimited_coins_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/134def40-f812-4a69-a9a8-b48172a46843/85978580329.pdfIn PDF document text
    • http://saragodofoli.epizy.com/37037096257.pdfIn PDF document text
    • http://jeduvuvojupan.rf.gd/49352838764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71be75c-f4c5-4305-8e6a-1457b6391f63/44483512784.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 5296 bytes
SHA-256: 243755c9d95c52f8c6d2a8432d565600dd6c12e86640e9f41c117062c6ebb5ea
font_01_sfnt_off00011469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11469 11256 bytes
SHA-256: 38b7b2f17f1a12b70dce43796a1a851aa502d5865df0f4eee342e2a5516a614c

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