Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0b99991e6fee35…

MALICIOUS

PDF

75.0 KB Created: 2021-02-27 00:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c3480f7b92dd318671043c49fa96bed9 SHA-1: 1c0bad255f964260c8a53fdd242fac4aeebfa0a9 SHA-256: 9c0b99991e6fee355cb3cb1810397403b4537af05bbdb33aeb910f7ec0b87945
126 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 numerous embedded URLs that point to disposable domains, characteristic of a link farm designed to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic to obscure malicious intent.

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://midufefew.ru/strik?utm_term=adobe+premiere+elements+vs+filmora+pro PDF link annotation
    • http://prosale.company/la_calaca_alegre_chapter_7_summaryzmtox.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/gikebisuvimoju.pdfIn PDF document text
    • http://vostokzapad.su/zozusimojuj6oy8.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/python_list_remove_element_by_index.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/lugegetijuxeromelabuled.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/litiragurakumuvi.pdfIn PDF document text
    • http://magic-world.site/pupuvasinivofi3bu9a.pdfIn PDF document text
    • http://small-italy.space/corrective_action_plan_template_auditmyrp4.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/maschine_mikro_mk1_manual.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/blackmagic_video_switcher_atem_pro.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/dimomoneba.pdfIn PDF document text
    • http://logoped-samara.ru/grammar_in_use_pre_intermediatevfdix.pdfIn PDF document text
    • http://wide-take.top/bozilogogoxabivevuxobebuhc5qp.pdfIn PDF document text
    • http://form-copyrightservices.com/kosoziguluvazajunixe8d1q8.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/how_to_draw_a_human_heart_step_by_step_for_beginners.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/78524850428.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gurabagoderes.atwebpages.com/3rd_grade_english_worksheets_free.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/46177666179.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_off0000e89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 5376 bytes
SHA-256: aa2799b12e79bb01296bf9fe8734f87cc15c7a00d46857e0c2bdb532eef25a24
font_01_sfnt_off0000fad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 10476 bytes
SHA-256: 37d7223ed3ab43a80bc74be36ff15f7db48d895fe67658e54877b5742b2f04b3

Open this report in the interactive analyzer, or submit your own file for analysis.