Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6f10be478d324f…

MALICIOUS

PDF

89.3 KB Created: 2021-06-26 10:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95afc9a0f85d93335535797803d1c45b SHA-1: 55a22257844c0313f095facabbd1a316e997acc2 SHA-256: 5d6f10be478d324fd2d78295c2d3a4122e5afd716241de13503c457afe1557d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/5f73c43cb0defbf74b0f342abe99b8da/24802396610.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/mpddcu1vt29onms6gpfb6cdr93/51899768968.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd1cee8f19---66913719324.pdf
    • http://fittbikese.hu/files/file/bezox.pdf
    • https://ppuhperspektywa.pl/files/edytor/file/1600321777.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/bdfcbda47a581d469d55fc0440809caa/82783990651.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/f04f86cb0da7bd329d0ad13eadea7f31/nejenajulexefanululuduxa.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d14f5bbe2---47741021627.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9of5ni4cqpdgqgh3pip6ro4fv5/nuwemutiteke.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f0a0547a5---45796538232.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830bbf49ae8---83859763789.pdf
    • https://businesslife.com/content/file/jakifudekunirivup.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0799afb62---zarokunuwatelitufeli.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/bebojekowufeja.pdf
    • https://amrapalispot.com/userfiles/file/86965808785.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/472d009c86903b3cfdfff9dbd11137af/manuvelevagijeratugososa.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/ac2aa16878f69f03ba51aa5dac4fab2a/31982102769.pdf
    • http://au-coeur-du-temps.com/userfiles/file/4860752493.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/266fca49198efbad85907aa9165f5795/21590669606.pdf
    • http://101eyewear.com/luutru/files/sugenunetato.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ddb3365d3b539c5d20aaaef5175f5526/28711117196.pdf
    • http://airconbank.com/upload/fckeditor/file/61790801054.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=download+full+movie+harry+potter+and+the+philosopher%27s+stone
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dba4.bin
c107fc835da5933f2ba37a30bfaac55bafc40a5f3542a7a491a4b65d43367db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 17112 bytes
font_01_sfnt_off0000f46a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 16792 bytes
font_02_sfnt_off00010c7c.bin
69b45ec6cfac80af77eb55cde1224f1b80ec2364c4c2499afd4a0c5ae84acfba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7C 17772 bytes
font_03_sfnt_off00013b06.bin
ba8e510092c5cc34e5605d88e444e65fa6faa722d1ca5517cedee93983f37a65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B06 11164 bytes

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