Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0860d0617c9c63f…

MALICIOUS

PDF

94.6 KB Created: 2021-06-26 02:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5c0a11b836736a6f189c493e9a23a0a SHA-1: f7a875939ccb89863d971287ed55bc93632b979d SHA-256: d0860d0617c9c63fb435b629cf126d4eeec5d09b7ecdeb753645d08c596b6874
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.centralperdana.com/file/rimadure.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccf052e0fa---99510891614.pdf
    • http://vonschickenconcord.com/uploads/files/fodiza.pdf
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/vifijesorufipabubogo.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160860008a175f---nodemorejaxixinin.pdf
    • http://dsm-trhs68.com/clients/8/81/818e764d3414495a915a5f66638dc9bf/File/7212613487.pdf
    • http://x04ydivan.ru/userfiles/file/biziwigutasiwexo.pdf
    • http://asupuro.com/upload/save_image/files/mifivetomuwinusuxejogimas.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083b06d796ee---88803270090.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4c4c755f2---43820241966.pdf
    • https://fiberglasssupplydepot.com/userfiles/files/basemigoputuf.pdf
    • http://fine-cottage.ru/userfiles/file/62393418356.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecf7f4892b---fapigikowejanosufopisug.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce45625a97---39484541237.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab208aa761---gevedesalojibil.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/64efc9867d5f41bc0f9c780c88e5d067/53889519889.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c50d1110f7a---jowuzuzinivuzo.pdf
    • http://w-f-l.de/user_img/file/76871527562.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/633eead515d14e7c616244d5458d49f4/99121254475.pdf
    • http://dreamcatcherltd.com/userfiles/file/meputabosifogawuxe.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58a27a8055---vipipukizen.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/24513757485.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=karst+topography+definition
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a6f.bin
a553e5410054dc20f9ab08e60d1083ebc2cce84fef71e4c6612b17c29e7c33f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6F 19748 bytes
font_01_sfnt_off00013c65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C65 16792 bytes
font_02_sfnt_off0001547c.bin
fc22e13ed3a1925fdbaffd8869ee0c178989f310a75209212cfc9302f7d4eda7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1547C 10836 bytes