Malicious PDF — malware analysis report

Static analysis result for SHA-256 792d5158338c9d57…

MALICIOUS

PDF

92.0 KB Created: 2021-08-10 06:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 095e78a6b8e8891d1f0ca6986dc3da8c SHA-1: ee8547c50b2448ffb9d93629623afd0f369293da SHA-256: 792d5158338c9d57223001911f3c8738e8b7d256b5c9ff61b775987cd9058720
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/uplcv?utm_term=cu%C3%A1les+son+los+primeros+s%C3%ADntomas+de+la+pr%C3%B3stata PDF link annotation
    • https://drosamahetta.com/userfiles/file/texikeselekebemigufik.pdfIn PDF document text
    • http://cjmjwarrickhudsonfamilyreunion.com/clients/9/9b/9be434dcd9982d5451de1b36a82eb828/File/zoputab.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/tozarajinovef.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/petijemuridixa.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa3b97adee---kagigipebalitanafabe.pdfIn PDF document text
    • http://realcomfort.ru/content/upload/file/bulagadoga.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fd0acabab76---zisimevumedukuro.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f604b5ed72---80023304864.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/75606209585.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/lksevumckl9q42jvq4f8v5uu4b/lukivibofetixox.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076269cd91c1---kozonagunijekixaxipe.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/jeduwa.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210628224744.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/a87a932f8a25b8406b53363808eecccb/84922228156.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9582eb9970fe07a7811c0b7c3d0ceb43/35615135261.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/xepajoluwuzudusoko.pdfIn PDF document text
    • https://ovth.ch/userfiles/files/zigebugepos.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/turixejemiluzuzi.pdfIn PDF document text
    • https://bfull.ru/uploads/files/lenegimozozagixetaxegotut.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/wazidezasakivizuvide.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/vagafugowolutowobeno.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/botafivejelugivenewu.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/buwolimeborukitekovug.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001016e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 11064 bytes
SHA-256: 63efa29977a3a30ef4321b7677f17beeaa453afc476c0c3bc7333e7d97e0ec52
font_01_sfnt_off00011a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A71 17584 bytes
SHA-256: f8b1322c24d3b5d74ecfa545941dcf2e3b85c60d6ef273ecbd8c10ab328d502c
font_02_sfnt_off00014738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14738 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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