Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbc36da646517aa…

MALICIOUS

PDF

94.5 KB Created: 2021-06-29 04:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 36f55f02420e821fbc2e25a3a3ab7c06 SHA-1: ac9626a5aea3353a4749d7a4a1a0f78e664058bd SHA-256: bcbc36da646517aa2668dd9397ed32a0f39616e8a2c5b8ac8f0070b6c0857b32
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These links likely serve as a lure to redirect users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/61141249c9fa2ae3260300b67fd934aa/12641460976.pdf In PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/572dad04788f6f6542001d2e85b86ced/9644861226.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/bulakovojonokinedajexufe.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160763c8da55d3---jujefedasi.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/gubutejufexaliperuwadener.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16086f11121cb1---54671404319.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/jejufekojowebojularorewaj.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/68026188275.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160da2468abc38---92701825180.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/df23f02b10e662e96d2903ae6ab787d9/18169493851.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095082f22bae---modexepoba.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/2c2e4f2f0cc1d961754c4b913440dc48/65306739297.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/4rvdfhlrtpdufi11p0gol653gj/71684652464.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/4402483269.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/47ac6db65b2452de802d6184178da151/jiviloluropezapevoroj.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/7ed3deva3rjutjn4kbf5t88so7/50208602819.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16088e400d1977---vitizovemerodu.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/987b89a85d3aa7dcb58e30df23ffaea5/44131615344.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/1789143496.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/kujakifajeloj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+use+of+who+whom+and+whosePDF 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_off00010b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12384 19140 bytes
SHA-256: 812d19fabbbc01fe3ba47bef65842475c99effd4f3ecd74f1f3e28a93537baf3
font_02_sfnt_off0001543b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1543B 10432 bytes
SHA-256: c442f98fbe1b83695665a2acd25387fb4ce3a1161f7e9929af161a5b2aaf4cf5

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