Malicious PDF — malware analysis report

Static analysis result for SHA-256 72dfd929c1fef04b…

MALICIOUS

PDF

75.2 KB Created: 2021-03-18 12:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 35f52561278a869c94bb299795fe8c65 SHA-1: b03f922a313a24b5ecbe82e7b40b68c08b59a2be SHA-256: 72dfd929c1fef04b2cfc4aac383a1299aa9d8b2ae889b665e9b0542c1390ca31
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://kuzutuzo.ru/wix?keyword=falling+from+grace+2020+movie PDF link annotation
    • http://vomenelavive.22web.org/animals_hollywood_tamil_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/GhbifeI/warotesopikiwali.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497348/normal_5fc9f5e619d6a.pdfIn PDF document text
    • https://cdn.sqhk.co/dilujuzaga/hh0t1ij/kavorab.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/bDOSgfE/gojiworivupu.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/hRbZF8v/2945490257.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408188/normal_600087cd7e0ab.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/ggibMja/jacksonville_nc_car_accident_death_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/iD55AKx/35341305723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451018/normal_60115e3dc8a01.pdfIn PDF document text
    • http://natotakujoriw.iblogger.org/errant_hunter_soul_leveling_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/vibUsgf/the_buttons_for_crocs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nipaxuwibaket.epizy.com/stairway_to_heaven_lyrics_by_ojays.pdfIn PDF document text
    • http://fomipituvopib.epizy.com/85747226509.pdfIn PDF document text
    • http://denawovusu.rf.gd/65754947891.pdfIn PDF document text
    • http://pekagotikoweguf.epizy.com/nudozuxane.pdfIn PDF document text
    • http://nisegup.epizy.com/peloguvogiboged.pdfIn PDF document text
    • http://peronilekovo.rf.gd/findings_report.pdfIn PDF document text
    • http://nasutewu.epizy.com/agatha_christie_filme_wikipedia_pl.pdfIn PDF document text
    • http://defiretojeven.rf.gd/garmin_vivofit_4_vs_fitbit_charge_3.pdfIn PDF document text
    • http://letinolav.epizy.com/how_to_cook_a_pork_roast_in_an_air_fryer.pdfIn PDF document text
    • http://kolitaguligod.epizy.com/fifubipamap.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_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 5312 bytes
SHA-256: aa8b8d6cb53d51f947837bb3445b3a18ca984f26fe5cda378aab2ce3295e37a9
font_01_sfnt_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 11172 bytes
SHA-256: 5e180be07c9c420b00fd3b01c7fdb998227e81897b6ba9ddbe55c349ee00f2e4

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