Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e837ff459933a01…

MALICIOUS

PDF

82.8 KB Created: 2021-09-05 21:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 53d7f32cf74c73f9c223a95e71e055cb SHA-1: 821cacc0af36ce8a02b318a937235a824ff26460 SHA-256: 1e837ff459933a015bd33e6dd26627125cbc28b49b0057eef6e46770de8c2f41
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. This pattern is commonly used for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://airmon.hu/images/files/90116719348.pdf In PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac82956337c---nijagudinosoj.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/patafed.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/gedidomezikele.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/63041670316.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee2607e562---19750606671.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1623658153.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/05f8f9ccc9b622c0ed66033dd21f31a2/zodezuwatezomezafimaz.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/srs36ptmr002fkbmpsnriqtutf/lupawojugat.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/gototisisatorunukowawopux.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/731e6d7d1794b56f95fcb594fad64cf5/69120181734.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/qshuk5mv033hngshpp835uk1ec/gitorer.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/33336224750.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/30525158550.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9fab82ef1---7650979877.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/37021621058.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/11792855673.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/966ndrt7chhsqbk2q3vop8nn68/fojel.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/8e0edb1d90983c734a0ade358ff0b331/dewijiveru.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/tirasaxetowikatavusimi.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803c2b85307---jafusiwaditaponepuj.pdfIn PDF document text
    • http://sport-way.ru/img/file/882025396.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/85844388913.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/24587671818.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=cambridge+certificate+of+proficiency+in+english+with+answers+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA0 17808 bytes
SHA-256: 904a878e3206804546642dc08de63aba8b34ae6ab8ec2f11bc708b907e75c560
font_01_sfnt_off00010a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5A 11440 bytes
SHA-256: c59e6aa5b60546a8179e48e9c58d0c3c1b47a374c46249326ecdad485b314aa6
font_02_sfnt_off000124d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.