Malicious PDF — malware analysis report

Static analysis result for SHA-256 702690936c85dbfb…

MALICIOUS

PDF

77.0 KB Created: 2021-07-04 03:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09a5ef0b121680224571b540ead80dac SHA-1: 535a916367df829a7a4af82776450e545edce7c3 SHA-256: 702690936c85dbfb71beb95e4efb61d35ba307f34c8f24f8bdd45e8cb27fddcc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure strongly suggest it is designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://garglob.ru/uplcv?utm_term=if+a+tangent+of+slope+2
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/sn8lp721q0lmnb8kb6u0h5ajc4/mitenofazawitavasalelogop.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098f4b28bb4e---powoboxa.pdf
    • http://megaprestige.ru/uploads/files/63369518290.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/8aa37311a9eb16ad045b53bd7699faef/xuxudegikatanukepemux.pdf
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/81971597908.pdf
    • https://subarini.ro/mm/file/56745174892.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/000aa445cb140e151bb26171bede0c63/92725460790.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/99e248987b2e990e5fd45f2eadba0c25/vitajexupibukufipuvex.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/mcik54a52801frh2qf3vr4jsk3/21784495501.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/2b8ea31afeebeb6ba727e4664088adb1/40305377987.pdf
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/butuwakakaxixekilusidiver.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d29544a2752---7924731488.pdf
    • http://clubesquilacoma.com/uploads/files/vevamagafokobegowinuw.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a0140d80620---17660002870.pdf
    • http://hogan1973.com/clients/d/d4/d4eda5e2427b34f3a15374adde9a77da/File/rozetojiverofisutopis.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/acd93c56f0e575dff9bee93626fc6abe/9381946042.pdf
    • http://jyjwqj.com/uploadfile/file///2021053016005564.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a580a1e9818---goluposavovojewobaje.pdf
    • http://ifa-astrologie.de/userfiles/file/taxutewivironigo.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918c68efe99---68922600388.pdf
    • http://busangh.com/attfile/fckimg/file///20210622161948_185572288.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/nisota.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f042806a61---tafubopazodudi.pdf
    • http://sitoad.com/bbqjoekey/files/202106040535123964.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb64.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB64 16792 bytes
font_01_sfnt_off0000e376.bin
0df0a88de499538fce67201e38c386e191656564c15acde8c85e4ca554fa5985
pdf-font-stream PDF embedded font (sfnt) at offset 0xE376 16756 bytes
font_02_sfnt_off00010f28.bin
4dbc4f83f5185f1476ba42316c048c15760832d4c9fa02814d3907171bfdbfee
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F28 10412 bytes