Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d60c45e01797850…

MALICIOUS

PDF

124.1 KB Created: 2021-06-25 15:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 599732e9caccd0a764a9a1901b8cb1f8 SHA-1: 10db767405363a73f2434b08d97d4b6252ffd645 SHA-256: 5d60c45e01797850a58c3f2d157bb630137e3d48066b872ea1297c7e3d3dc73d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. ClamAV detection and ML classification indicate malicious intent, likely to lure users to download further malicious content or to exploit vulnerabilities. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to distribute malicious links widely.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/0cf3b4eabede279d7f5f37ac8df01bcd/11665185524.pdf In PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/6bu2pbtnc3b6otrht7hi803qi0/997213918.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/8a7gacvp4l4j45fga2g3rni3n2/82430352486.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b6379d9b2---dorifo.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608898ac4c9f3---94684487216.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160989f9559854---nenalegutikatiwanufanab.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/22887358359.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/99390132316.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b04d5421241---gajev.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/f640171daa64c4682bfd0abfd0dc1b62/dedipiwakalagad.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3343ea52a---jetunadilopalogogex.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/pemokebodefeluxelebe.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7023c65e4---50912021766.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/2c6b21bf07ee3af7e9bf0b5b19abece1/xamigaxebekuvinomuv.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/nonudikanemonamunata.pdfIn PDF document text
    • http://cutskytools.com/d/files/bowodobekav.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075ffe2cd08e---tevaxitifel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=my+vision+sheikh+mohammed+book+pdf+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16211 11156 bytes
SHA-256: 2622d35668c44467a5b823ddcebdeb6d55f2b3656924c62485043dbda042b77c
font_01_sfnt_off00017bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000193cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193CD 19728 bytes
SHA-256: 2f2c4197311a0972a1c7d0b07954e8985a1bb5ce72792fbfd26824adf627f824
font_03_sfnt_off0001c6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6A6 17856 bytes
SHA-256: 48f42bd9debd15130b2cba3bd5e14f765139349c3bad6d2a54354b109db31fd9

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