Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39fcfe8b313708f…

MALICIOUS

PDF

85.9 KB Created: 2021-04-02 05:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4633234ba79e1e66fc62ad3d8f0c8117 SHA-1: 8e3408569e42d6575f3d2f47ac8fdf6b7a972843 SHA-256: d39fcfe8b313708f8ee7cc62b3e3dfef411792ab252971e88349c038ee77a202
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/wix?keyword=whs+pentagon+library PDF link annotation
    • http://rapoxarawiwalo.sportsontheweb.net/28939443903.pdfIn PDF document text
    • http://hermidkovo.info/wasepelofukwqiaw.pdfIn PDF document text
    • http://eurostore.info/conversation_english_apprddgi.pdfIn PDF document text
    • http://predouche.xyz/84781445339bq2de.pdfIn PDF document text
    • http://rte-ita.fun/jitemopanuvawojagoq7gq2.pdfIn PDF document text
    • http://freud.icu/super_mechs_2_free_online_gameszqkej.pdfIn PDF document text
    • http://damvglaz1.xyz/97160964582hrydf.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/pretty_little_liars_book_3yw0fp.pdfIn PDF document text
    • http://help-violation.com/the_winter_of_our_discontentt37oe.pdfIn PDF document text
    • http://detonic-hypertonie.website/mcc_english_guide_2nd_puci3h9l.pdfIn PDF document text
    • http://regsenatvumen.website/brother_printer_hl-2140_instruction_manualjjmch.pdfIn PDF document text
    • http://xivekoto.medianewsonline.com/26078223762.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_fc55cb2426684237973fc22dad160dd9.pdf?index=trueIn PDF document text
    • http://dirazonun.myartsonline.com/gone_with_the_wind_pocket_book.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_17d5257fa3d4443182b555c5c31f2b2b.pdf?index=trueIn PDF document text
    • http://rewezaxow.epizy.com/converting_cm_to_mm_worksheets_ks2.pdfIn PDF document text
    • http://popeganezawojeg.rf.gd/guitar_hero_metallica_achievement_guide.pdfIn PDF document text
    • http://zalipimotumotim.rf.gd/human_biology_book.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_7832b3962e254ecb87d7760685782a3a.pdf?index=trueIn PDF document text
    • https://9169454a-6e45-4b39-89c4-5cd9bf0a6084.filesusr.com/ugd/32fbc8_e48d79509d184686a25ee5ede195a75d.pdf?index=trueIn PDF document text
    • http://jaxages.epizy.com/72438308600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee008a5-12f6-451e-a6e3-3f429f2472ce/carlton_and_perloff_modern_industrial_organization_4th_edition.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_2dbfefd9c4c1405199bbfb91ec510897.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/062317d4-c0ee-4e33-ac55-88b8b1d947d5/weight_watchers_scale_target.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_off00011118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11118 5336 bytes
SHA-256: 6804a12c764b51de69c0e38e3342d6c585165841d385315bfaadeb0188a67815
font_01_sfnt_off00012349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12349 11632 bytes
SHA-256: 864e1b3f429d38664406d775eebec07c2650e99bfbd7fc491b86dcaa36e694fe

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