Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9f741404407837…

MALICIOUS

PDF

91.2 KB Created: 2021-08-05 15:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f6054e6ce403c03438cdcd6880a9e55d SHA-1: 39eeea1a8ddafd84b996b1aca4b2746994473dd4 SHA-256: 8e9f7414044078375c065e4358c547885c852a0d3ae6d1028b31c8d942130ba3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring users to click on these links, potentially leading to the download of further malicious content or exploitation of vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://cructi.ru/uplcv?utm_term=suicide+squad+full+movie+free+download+in+tamilyogi PDF link annotation
    • http://portalpr-b2b.es/img/user///file/_0656636001626497919.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/sodiwovunuruxapawedap.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/norevajufiguzezanufow.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/gupozolofimob.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/fupikajoxudelir.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/59185519548.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b290bc39bab---rupurakiwekovofog.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/xajiforasepazad.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/7b91b36337540f90590e977cabd495db/54762941597.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16102db6b49641---wusexuwasuped.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/66561291544.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/pn9ktttldpk6pfjffikfgk7bo2/67915979840.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ae0f85a19---86933767942.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/1439607180.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d48f4ca9a---83530419375.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/72080624363.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/7538f9a07e48cf200f4e983536e1c742/93698446529.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/dbcrbntst4ka7srs7m86u5pt00/sekaxaviberigojoge.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/jorabosolo.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/giferipamewuwok.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4315d9c15---27549043324.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102f702eb1f6---42644298113.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_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001139d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139D 11408 bytes
SHA-256: ead710e6cfa6651ff0bd11b719a2fca9e25b8e01c18e2b7953bf2fed079a96ee
font_02_sfnt_off00012e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E13 17532 bytes
SHA-256: 0a5190d0d122b99d49cc497254b24b40d1e973f297bffb0fd8b8a0d23b66459e

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