Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ff343349697bc6…

MALICIOUS

PDF

90.3 KB Created: 2021-08-05 20:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d0de0927c682e6f15bce8aee7be5c310 SHA-1: 7b2b80dd581a940a3a8deee9b1ad1d2730855e1b SHA-256: b0ff343349697bc658cec722c3032b50435fa5835131b3e4b5b88e284951634c
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted from this sample, but the overall structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://diysmart.net/userfiles/file/24651323385.pdf In PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/b44ab7451f75115e60435a8c20fe3597/76276466930.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/ea3f95b57811cb3a57dfc6efb5a87f03/22164303482.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/87308354110.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077ab41b4764---lazopanapedejore.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/d6aea6765233389708cfc0f49c1ad37c/wijixolilizu.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/8n8sajk7h6gib5r1gtofng6gn4/sejinodesolofo.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/kawaxenagarawuwufixisog.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/fulekobuviwasifegu.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/zifolu.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/pisopenavifokomodizax.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e161b0760660e410c825ff0cbf72dbf9/fevepefewirokavatijiv.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/c759a2fc0a123257cf701577dacda890/73241207564.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-22/20210522104505189407.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb45504412---fewimenimagipewi.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a21628b0a---gomuturofolajasoliripa.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/fba3905049d8963e2054e4bfca57de67/xoxidosiwomujafaxugar.pdfIn PDF document text
    • http://zerosquareonline.com/file/78046698180.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3910a68e11---jatimom.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d29bf1a334---36780464714.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/7114635250.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9633bd903---wogusomewew.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/xijupugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=difference+between+borderline+personality+disorder+and+schizophreniaPDF 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_off0000fcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E5 16836 bytes
SHA-256: 3980b49921a44d44b1104e28aaadbd38b5053dbb950072c732bf275c28fb9232
font_02_sfnt_off000140bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140BB 11116 bytes
SHA-256: 70851dde02a48bba22f2a056c175ce2d1cb94633785460e2fdc3abd8749d93de

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