Malicious PDF — malware analysis report

Static analysis result for SHA-256 0122767918d00dda…

MALICIOUS

PDF

89.2 KB Created: 2021-07-02 09:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c4bda9f52f7e9f611aca4679793af13 SHA-1: 46c1737f6424ad88f8aebf8eae9de7b98ea1c0e9 SHA-256: 0122767918d00dda302e867cd73ab8b7f9e4b932c131baf15dfb9b6d06a93fee
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 phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and the nature of the hosting (compromised CMS uploads) strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/m59ccahnnejlsk66p790natvq3/15942771070.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084aad49d98b---fikiw.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba7f9e5cd9---manuvititivipodofube.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/cf7caa47b4af801516e8ff9aa1653381/morijukikamujodimeleximo.pdf
    • http://thecreditcrisis.net/clients/73966/File/sawekifuvitixilekagezo.pdf
    • https://socohoteldanang.com/uploads/image/files/20355339073.pdf
    • http://tpdw.pl/userfiles/file/16639645752.pdf
    • http://www.look4job.gr/images/_user_na/file/tufemix.pdf
    • http://jjmcp.jp/userfiles/Image/file/puravu.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/f8432d73922ad513f4dd7e2d2fe0a106/58398027252.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160862168cf632---37190992411.pdf
    • https://stijsr.com/userfiles/file/wefonizotuneso.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160833291ec1b6---74155208710.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5fcdb4d97---32410023436.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/vmqimribct9nk2ecl3aeh45o25/tujopelikigowuzozifisonan.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a002fc4329f---44962740146.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609169acb063d---nafikoferetoxaw.pdf
    • http://omni-links.com/images/blog//file/wejadi.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607608c53a74a---74541419805.pdf
    • http://driver-jazda.pl/upload/file/biduzun.pdf
    • http://caratow.nl/userfiles/file/wadiwevewenijavinapo.pdf
    • http://provia-events.de/pics/fotos/1/file/jifonerejiboreferisu.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/kutpr94jag0kju4oil3t0a6gfh/rapirosilonig.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/785e7e6d45abd342e997ff0631cba329/88637244248.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/83dtp5h4slfr2hs0iun2esg66c/disuzijevikesebizixavul.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=four+masted+barque
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f8.bin
9e8bd0252b3d5287f83df07d9ea4437ca42b902e9308ebb60c310a1d314398fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 10532 bytes
font_01_sfnt_off00010ccb.bin
cd1f214e451bce64464a021dd2062884a6a6c65425ac1360c39da919ef869f02
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 20148 bytes
font_02_sfnt_off00013f9b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9B 16792 bytes