Malicious PDF — malware analysis report

Static analysis result for SHA-256 575d89f3e545929f…

MALICIOUS

PDF

96.7 KB Created: 2021-08-12 02:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 6b73a88f5970ed8b9695c1fedb820e19 SHA-1: 9c6b66bf17b06f4238e631f5e942a78a0e8aa1cf SHA-256: 575d89f3e545929f16a1fba563c96a70113a5241a3e56e0b65e929180fee254e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The embedded JavaScript stream and the ClamAV detection strongly indicate malicious intent, likely for delivering a second-stage payload. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b50ddb97c8---52062607296.pdf In PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160eca6b18f096---60241316327.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4056faf2---zedurisuferokipevi.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ed98fa7c24a7e8fa25b17342b9904ed9/bulirasad.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/16858329136.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/5cae1465dfda0de22a88bc587ff1f9e3/72280881464.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/94185616709.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///pogumevarafonesatov.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/59067903354.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae2f98d1d4---902725978.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/1475f90c5654255fc085a79b1399bdfa/651113276.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/90d4ceec88b098a92a6b60082ce702c5/duwasoweratodedoxupeloso.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/77031491294.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f874624d3---belosemanogageve.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/retebulufiwomig.pdfIn PDF document text
    • http://khacdautron.com/Images_upload/files/marofebajaligejunopape.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/nulabakimeritajawozovutel.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/ov0krpd9chs66kf07rj2g2rlt5/guvubukizedesoduzalik.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/pejezaf.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b57dd8addfaedc5a1cf1b53f91e043b4/41611444022.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/34409792473.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3fa60fa2e---49805661188.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/zebakozebi.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/rtd0tvp2vrc6rnrjnb0kgsfr0p/rotem.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df2b2a87cd---92651361223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+use+guided+access+on+iphone+11+pro+maxPDF link annotation
    • 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_off00011476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11476 11244 bytes
SHA-256: acae0f5fb9969f010c60d3a0475ac33ab375323e911cd0e85634ea9971c70940
font_01_sfnt_off00012e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14697 17240 bytes
SHA-256: 04aa068033adf300f4fd2dadeb0245613bdc7ab9c7b036b3ee42c4d358247b60

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