Malicious PDF — malware analysis report

Static analysis result for SHA-256 3402b1feb43e4fa8…

MALICIOUS

PDF

88.7 KB Created: 2021-03-24 17:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 57b8e8ad8197c3217183cc07a5464733 SHA-1: 2427f9890029378b40c0d58b4c9b89f477ffd05c SHA-256: 3402b1feb43e4fa8b94f0cde6053fd07cddfd5cd3e6c46b137ddc02a038aaba3
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=gps+garmin+oregon+650+manual PDF link annotation
    • https://cdn.sqhk.co/kiviziko/icWgdjf/simple_responsive_website_design_templates_free.pdfIn PDF document text
    • https://lewumirobubav.weebly.com/uploads/1/3/4/7/134762292/9bf9a89e.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/xaburowiriv-fexakuji-gujofo-vajulelofifagit.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/ihicohb/gp_sheet_weight_chart.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/kenmore_front_load_washer_and_dryer_sets.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/g_shock_wr20bar_review.pdfIn PDF document text
    • https://lolifibek.weebly.com/uploads/1/3/4/6/134634661/kefaz.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/hhDhcij/romojogijumegoze.pdfIn PDF document text
    • https://jikesisepam.weebly.com/uploads/1/3/1/4/131406861/tamevoko-perabojigipedug-vejeku-doxevax.pdfIn PDF document text
    • http://wiboratiraveguw.mygamesonline.org/bobufibeni.pdfIn PDF document text
    • https://rojilijeliw.weebly.com/uploads/1/3/1/4/131409822/mulujaduvugum_lotawewubagun_xifama_binazobunijezo.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/xosimivelowazezafis.pdfIn PDF document text
    • http://serawuv.mygamesonline.org/17981438915.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/mjeieij/82888518166.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/tekogowatutijize.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/e60ce0dc-b518-4bab-b60c-2d19e7d95b49/dawaligekulekigijevobex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06352a9-f2d3-4eb5-bf8e-6e839931d8eb/78317956014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368db5c2-d85e-440f-9197-d16cad8e46c2/ulysses_tennyson_poem_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472cae38-a896-4985-b8c3-6f5b3dbdb000/752670519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a322a5f5-a544-4b3c-a52e-fc5e38f4edf2/8792656431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c099be17-2a66-4bb3-b8ad-2ae5c6c6e394/82560624150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04b216b-098e-429d-af96-4d2fcb2733ac/how_to_charge_motomaster_eliminator_battery_booster_pack_with_air_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88843945-c81d-4e22-b1ee-015b44236adc/25612726178.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_off00011ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA7 5592 bytes
SHA-256: 5d631688f44a58cd9f391d5051c9a8097a51f4d71783629ec3b9afb330a3b40c
font_01_sfnt_off00012f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F96 10988 bytes
SHA-256: 1ff0cf7684d42187d53f9b28189dbd5c004e1c20786df42b20ed9c3ae382fe60