Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f3980a7eef0e62…

MALICIOUS

PDF

78.6 KB Created: 2021-05-06 17:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f16071ce0682c08f39a8e39e1cb64981 SHA-1: b483b14a9ddad108b709c7daadc266613e28bfb3 SHA-256: 25f3980a7eef0e6240cc8d53f7034cd5a582aa8b612a664fbd8aa403141234b6
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 0.9996

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://gimoguvi.ru/strik?utm_term=toro+20332+lawn+mower PDF link annotation
    • http://cashfree.store/xazokebejireduri89kaw.pdfIn PDF document text
    • https://xuvifadeto.weebly.com/uploads/1/3/2/6/132682806/538210efed2e.pdfIn PDF document text
    • https://vobawele.weebly.com/uploads/1/3/5/3/135334277/nijalune-mizubuko-buxesom-kibiwibawes.pdfIn PDF document text
    • https://dowosebiz.weebly.com/uploads/1/3/1/8/131871919/golokuxiso-nedepenam.pdfIn PDF document text
    • https://cdn.sqhk.co/ninituraxasu/xaibkji/police_costume_photo_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvopone/O9UjbFK/fogalilafemuxika.pdfIn PDF document text
    • http://apsmall.space/gugowalajapagakuwoxuv8h0sz.pdfIn PDF document text
    • http://a1metromovers.com/best_plugins_for_mixing_and_mastering2ujox.pdfIn PDF document text
    • https://cdn.sqhk.co/naketego/FngjWS4/toworovude.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/icggOiw/28335790748.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/7d70501710498c.pdfIn PDF document text
    • https://zupalopozaguri.weebly.com/uploads/1/3/2/3/132302876/rivulon_wusorajedopej_zaludoruwud_rofozegovexuwa.pdfIn PDF document text
    • http://detonic-hypertonie.website/692131129695x0ps.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/ibWhdhi/mififajifajevoxo.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/zegakevotudu_murolamovezulow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mepenaxuwijun.rf.gd/dynamics_of_machinery_class_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a092e5-3954-4ee3-8722-993eda7c0f1a/french_in_action_workbook_part_2.pdfIn PDF document text
    • http://xuwajapu.rf.gd/suvude.pdfIn PDF document text
    • http://luvoxijamubisur.rf.gd/36588817287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed129c8e-4a1d-4d05-b2cd-c071d0b6d986/how_to_look_up_ge_tax_id_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd21ca1-3423-4f51-810c-688987d489ad/what_is_the_schedule_for_the_playoffs.pdfIn PDF document text
    • http://kugogawi.rf.gd/keurig_office_pro_commercial_coffee_maker.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_off0000f58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58F 5132 bytes
SHA-256: a011795ff25c683ce68c817ef9951befc8766fd96a40f83a18a58c2eec52e24a
font_01_sfnt_off000106fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FC 11184 bytes
SHA-256: 0c39b96afcab27b613bb3f8fc0f5488065488b3d9e65ae163afee1f92cc1158c

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