Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc47ca96af411ef…

MALICIOUS

PDF

73.8 KB Created: 2021-09-06 19:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5522888dedc3727d9a91c0481494405b SHA-1: 5ad37cdd961d75d0bfc646e633e80e7b51222b36 SHA-256: 2cc47ca96af411ef54fb08935318b6e7cf1cac46879004383dd71e4f57ebe75f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious sites or download further payloads. No scripts were extracted, but the presence of multiple external URIs suggests an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://pixomot.ru/uplcv?utm_term=rapidex+english+speaking+course+in+malayalam+pdf+free+download PDF link annotation
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/b4c929ad85f03029d219de4865d243f6/burime.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/bugexilawuroz.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1625403994.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/d5096b2266d9468c24f8cacceae1c946/4550093187.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/gojalufizuwuz.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/fb7ac152b60f115543a3a954a53ce4bf/29113794944.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/wonolinolileterukajudava.pdfIn PDF document text
    • http://unseretochter.com/images/file/tezujepurufopojupusomod.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987951e9c07---30724012635.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/1882916914.pdfIn PDF document text
    • http://jaika.in/images/documents/files/9435687859.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/99807938050.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/kaseraba.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160adcd7354656---didawi.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/9458775855.pdfIn PDF document text
    • https://anfauglir.com/images/file/3751759317.pdfIn PDF document text
    • http://web5gstore.com/Files/files/5547084916.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5c96649d2---81676970651.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/28978350795.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/70527003977.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/13170167182.pdfIn PDF document text
    • http://lactopad.com/uploads/files/71442776662.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/41409234753.pdfIn PDF document text
    • http://beijingteye.com/upload/files/15430719199.pdfIn PDF document text
    • https://businesslife.com/content/file/7557565198.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/47538872270.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d3634af3979---fineneganuzerudij.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B4 11508 bytes
SHA-256: 9209a9b532c6bc3900afb2270be7c2f774963e57db787aac232a842d37b7d028
font_02_sfnt_off0000ee98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE98 16256 bytes
SHA-256: 94565686f2eb4a62edaa0c07ec35ed6de091afbf709cc2ee3595f26241b524e8