Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b30195732c33b46…

MALICIOUS

PDF

82.6 KB Created: 2021-04-07 14:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: be25dfe2f3da2eaa58b0f08b11de1322 SHA-1: d2494c12ee6db33a73a8de9c3185c5a3e8213b86 SHA-256: 6b30195732c33b46a952b0894bb6589b9fbafa5b8a131ab14b1a672e875d8827
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, indicating a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/123?utm_term=bionic+arm+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447433/normal_6044606f1a865.pdfIn PDF document text
    • http://rosolab.scienceontheweb.net/witamilofawesesulowuma.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/song_of_solomon_1_15_2_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_601cdb1b48f1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428078/normal_600e8cfcafed0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_6009e5a9a9692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_6010a315a9acb.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/best_chess_books_for_beginners.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412382/normal_5fc743e2daf91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492275/normal_5ffaeb8354076.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/how_to_change_battery_in_digital_meat_thermometer.pdfIn PDF document text
    • http://datujizid.iblogger.org/7292381355.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403823/normal_5fffc195b0c17.pdfIn PDF document text
    • http://bigonetudukori.iblogger.org/flightradar24_pro_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_604bb872ca22e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/78644888133.pdfIn PDF document text
    • http://xijovapafibowuw.rf.gd/85708442863.pdfIn PDF document text
    • http://jixopararaz.rf.gd/bharathiar_university_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea14ff8f-6ba5-4836-b85f-95ed04a3a571/91245338737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b049e40-7170-4719-b476-040e59466d3d/3_things_that_describe_me_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44669e35-904c-4d21-a27a-e5e0b640eaa2/how_to_ask_your_girlfriends_parents_for_her_hand_in_marriage.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 4952 bytes
SHA-256: 204a3c8d39af92bd712743e75eee1e3d1bad38d416b5ab8c61003f7309255812
font_01_sfnt_off0000fe0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0B 11724 bytes
SHA-256: 2ed617459e87225f24b733dbaa4944b33df80009b6c1800a827b34cf162bc62e
font_02_sfnt_off0001261c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261C 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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