Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab1133dd1536252…

MALICIOUS

PDF

86.7 KB Created: 2021-07-18 18:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6d0b1e0993ca9a0c00681aec413ff168 SHA-1: 6ae40552792f30c9d5b0956599d2682405609f4b SHA-256: 7ab1133dd1536252ee6789584bca7195b8ead28f85d8dc695bd5b7300385ce29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF file contains numerous links, many of which point to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing campaigns that leverage link farms to distribute malware or lead users to fraudulent sites. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://tivatijapan.com/uploads/userfiles/file/97522033165.pdf In PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/73310307456.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/46639540564.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/j17de9gubli1m5brm95mm8000u/54774391902.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/v9c57c1e77677d6cs1i797t37m/zogiwelose.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04f86dc215---44148921087.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079eb32ca61c---kixetawodulamo.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091044a35579---91072050386.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/posururefumivajebaju.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/902c7dbd698d0d397eca655de6d8c8dd/98935711772.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/pakabujisemenowede.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/wejatotemoko.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/wovivadisasiponutaja.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16088e9fcc29a3---vaxidokolavoganujabom.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a226ba2a364---veredolumutamisukexabiv.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070385603478---68383840246.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607190f566709---disogavojezaket.pdfIn PDF document text
    • http://albertaracecar.ca/clients/49797/File/dofavo.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/kakapafebabujulibu.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/69kkmiul4k9ehtg1dbrg2n2qd6/reganewo.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/40843813442.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/7a6393e86ff22731698bb14a5e96e9ac/pijupagud.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/nejim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=thyme+flower+meaningPDF 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_off0000ef5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5F 10560 bytes
SHA-256: af36115dd3bb6bcc9d21623d21d112ce0bcf9c543eccb7d36af2174a361829e9
font_01_sfnt_off00010743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10743 17872 bytes
SHA-256: f747cc1be3697cd8a3594b7f26d110e0034f84972793211037ce9a4776db8635
font_02_sfnt_off00013440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13440 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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