Malicious PDF — malware analysis report

Static analysis result for SHA-256 602ed23f2a456dbc…

MALICIOUS

PDF

74.8 KB Created: 2021-09-03 14:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7651bcd241854304634a97b575668402 SHA-1: 13764f1019bec08cd547382388b9749776424600 SHA-256: 602ed23f2a456dbcb6a1ab2a1f2625af7e019d6f0dccf1a0b717f0c0a7cbff8c
196 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. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to copy and paste content into a command-line interface, a common tactic for executing downloaded payloads. Several URLs hosted on compromised WordPress sites were extracted, suggesting a potential distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/53b479b810a6eab467e4797043865471/jefawifudifoxonorepunox.pdf In PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fccae5306---wuganisojefomubipura.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076535081a48---15980761561.pdfIn PDF document text
    • http://didula.ru/img/file/jexajedusazatalivejemive.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/ufj0n28sjfv3hklboqh7bculs7/mamefalage.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160df899923584---31860985760.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/sapopufe.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/weturamatemiz.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89e58595b6---zubuwilexovajez.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16102ee5400e59---85777404227.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/59432553404.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/tuzixojutamalelekogozo.pdfIn PDF document text
    • http://soles2walk.cz/data/file/90090669740.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/dilisesoxovevu.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/6i70o4tc9vftcbrojk0lgabgm4/27357734743.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fca5be4391---26881483649.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/judirud.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/tarag.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/b5a883430860f3a47c096803c3083fe6/2991890490.pdfIn PDF document text
    • http://medi-sen.com/files/files/dufofelekevet.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/485g929kghupcgj9bhg9ii5ou6/zixubijijopan.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160faea019e0e0---51314553898.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/jingnmfhcnccncmag18f9n5m4n/89884778922.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/56327e3bd318ba0066cf50e7ee5d9138/78783791976.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=shellexecute+vba+print+pdfPDF 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_off0000bd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD521 10912 bytes
SHA-256: 1e660340251b8f9b1339381692c722ac7fe31b9a5562502ddcbb2f130a618338
font_02_sfnt_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 18348 bytes
SHA-256: 6bdc4f1b2c89362c8be9ec29c38883b08f5d5d5ddbe11c0f3817b5fb3db8ab26

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