Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74a736b5a438953…

MALICIOUS

PDF

86.9 KB Created: 2021-09-07 09:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f1da9906bce0f866f89a72e3867284e0 SHA-1: 0c7c0909c1937bf751b8031cc6c1e7578acedb86 SHA-256: c74a736b5a438953073bdcff21a20fae23bbf6adc92f52a150f8160b6e58d0ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to various domains, some of which are identified as compromised WordPress uploads. The presence of these links suggests the PDF is designed to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7086

Heuristics 5

  • 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
  • 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://laborke.ru/uplcv?utm_term=workflow+management+pdf PDF link annotation
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/namigebunevujosu.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/05cc892525938d293c63778385d9b94b/lekojavekisukem.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/58940393934.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/17187560610.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/nuwoginorenobijuj.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609db51fee6dd---wowedipezojuvi.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/65617780802.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/315vrmmdcque2eln0gd2t5ube7/detudadapiladulujov.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ca3763160---84459609198.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8533271cb---27880970307.pdfIn PDF document text
    • http://grimastone.ru/files/zujamum.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/q6b3ctslvsp1h28e3tub44jv9f/sakavivukezivo.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/54654651412.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/62165324920.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/57rnt5f9tv802sla8asg4bap7f/sogeketikaxidon.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/b98a3a5ae3b9f57051234d6478888aac/51031335349.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff892773ef---vizakolajesiwovof.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/bv7d7ahma4qsgglbkaijd172b3/xapufanurepivel.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/7bedd655095e2022a96513ec8a85bf47/93524671924.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/60280337386.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/mubesosobikitavi.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/m6cbskpf7ennjief6a39q17lde/91037134788.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD1 19044 bytes
SHA-256: 016b928f3428ea31f9c2626d8fa5365174f5ba3053f52381241a617bed5ab5db

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