Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3d1574aa1069d2…

MALICIOUS

PDF

71.5 KB Created: 2021-02-18 18:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 180b2df7c8fdfa0a941996305ca161d4 SHA-1: bcc8037274564d61a821c6870851688540193262 SHA-256: 2f3d1574aa1069d292fdcffed63c1d0e7afc701bd649b49632c4bd44abde77c0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=what+do+you+do+when+your+tcl+roku+tv+won%2527t+turn+on PDF link annotation
    • http://moreprodukti.com/how_much_a_hvac_tech_makesxy74.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/idtFCjd/61336168063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365624/normal_5fcfafa3e9841.pdfIn PDF document text
    • http://copyrightshelpscenters.com/jatezipawapaxawewisulaxiu856.pdfIn PDF document text
    • http://good-production20.site/snake_coloring_pictures_for_preschoolersfk0iz.pdfIn PDF document text
    • http://creditactive.info/85283490323w8pz6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482191/normal_5fc695fcc90f4.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/hdiesSL/running_fred_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/Diegdgd/nefepokuxilapevoni.pdfIn PDF document text
    • https://vafabifagid.weebly.com/uploads/1/3/4/5/134583570/noxofekemubox_toxogubizoxujug_dovifazem_xumarat.pdfIn PDF document text
    • http://homeolimp.com/jizemasonabaveratujodni7m8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_601756720e997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381344/normal_5ff5264562c7b.pdfIn PDF document text
    • https://wipiwabe.weebly.com/uploads/1/3/4/4/134438476/4ad4eaeea791.pdfIn PDF document text
    • http://imedo.ru/yojana_magazine_august_2020zio5h.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/682471.pdfIn PDF document text
    • https://maxanijalezo.weebly.com/uploads/1/3/2/3/132303118/zumijukuxirososivuzo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5ff3916fb9bac.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/icMk0gi/pocket_arcade_story_pro_apk.pdfIn PDF document text
    • http://help-bluebadgecenter.com/slow_peaceful_and_calming_piano_musictqxpl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 5212 bytes
SHA-256: c3916f1082d3f533dcb4bd7662fc237eefa225e4d2f39754f61281ea5a8fced3
font_01_sfnt_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 10916 bytes
SHA-256: 34abd986b79646a4e1ed3363ec1b88a17936830eda02469af179b07f943031e8

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