Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1c7d98ecc0c0be…

MALICIOUS

PDF

81.9 KB Created: 2021-03-17 15:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ed9090febaae964e93589685991f6b41 SHA-1: 58fd4702357815a389fa6189d79e45ed980fdf60 SHA-256: 5c1c7d98ecc0c0be993ee78d13e410dc7a41659f8ba2b18d81055fa9bbabbb09
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or unknown domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://leonvi.ru/award?keyword=beat+the+street+peter+lynch+pdf PDF link annotation
    • http://xixofafil.medianewsonline.com/engineering_mathematics_questions.pdfIn PDF document text
    • http://zagozogenef.sportsontheweb.net/kowigomulolesuxuxod.pdfIn PDF document text
    • http://wotevolodux.iblogger.org/how_to_install_and_use_mods_with_skyrim_vr_on_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450259/normal_6019201f1ce71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_60003136f3302.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/32228369512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xitirinajeki.epizy.com/absence_excuse_letter_template.pdfIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_c9a0e4e1a49546d99c24a0bcd8b3e7ae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1977b6-121b-4481-a747-3a58ae93ab4e/vosozenofopi.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/36530902910.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_ea14c6a07f654fac8a534fec1016dfce.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_b087096c906a42c9af981f083598672c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wavunot/para_que_sirve_tomar_te_de_manzanilla_con_anis.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/zokevuborebifovilurixa.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/apprendre_grammaire_francais.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/america_city_image_hd.pdfIn PDF document text
    • http://nasukenapab.epizy.com/picsart_hack_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/where_can_i_watch_the_art_of_racing_in_the_rain_online.pdfIn PDF document text
    • http://vujegojuxuwu.rf.gd/2018_toyota_camry_sx_v6_for_sale.pdfIn PDF document text
    • http://fakaxuman.epizy.com/zizopawowamuf.pdfIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_7dbe87cf740c41fba87761d60158a4b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbfd39c9-0bf3-4d26-8fb8-fa8f9c943fb4/dabeduduwefotunerogofeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4801783-57ed-4646-8360-61a194161136/sharp_inverter_air_conditioner_remote_control_manual.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_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 5396 bytes
SHA-256: fe8f661344bbb81eba7fcd776f8bf4541cb3d143e2637d88af2e0fe15980feb3
font_01_sfnt_off00011310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 11596 bytes
SHA-256: 4e4ff7be6f582d51a5bfe393ea3adb2efd0007283474af94234c7e0f40393191