Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cac1f5e3d6b7cf1…

MALICIOUS

PDF

84.2 KB Created: 2021-09-02 22:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7ed480dcd5c7c5f974d4c9c9ec53f7f5 SHA-1: 4432c256f8fba1eb72bfac7e4edcc1e05bcaefb1 SHA-256: 7cac1f5e3d6b7cf1f550b49d25809f92e70dad0bf967881395ae8046636826d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous domains, many of which are likely compromised or disposable hosting, designed to redirect users to malicious content. The primary attack pattern involves luring users to phishing sites via embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://queure.ru/uplcv?utm_term=hydraulic+press+circuit+pdf PDF link annotation
    • https://atesolve.com/ckfinder/userfiles/files/40321601640.pdfIn PDF document text
    • http://teplospectr.ru/images/files/roroxojidepumogi.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/30102951730.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/0ngv6kttvql15lck369pfretrg/sedolijovubofenidiweruvol.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/35067845223.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/844fa39e860fb8f95519225edc1721f5/lajegojegulipajemuru.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a614c5b51a8---gededakavolisiviga.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/dafijolorixurajera.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbdcbf253d---74347565113.pdfIn PDF document text
    • http://calisnt.com/uploads/files/pijekeriwupalifotipiv.pdfIn PDF document text
    • https://www.leeja.co.uk/wp-content/plugins/super-forms/uploads/php/files/eebbf6890dc9ebb3f1c455a2d13bdd23/nupopotede.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cb2f5bfd1---soxusup.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/58729684913.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5587aa9d95---mejibizisofusomuzupodaw.pdfIn PDF document text
    • http://xn--xhq021fvrwdth.com/d/files/8216334361.pdfIn PDF document text
    • http://jp-cable.com/d/files/wajewaleta.pdfIn PDF document text
    • https://ckmandarin.com/uploads/81538389964.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/c82fadfb40a4504bb8afc0d36ddb61d5/kafevopodozo.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/pipuxixoguxujanitebe.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b39b117a2---gimitonagiretomedax.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/ehqjamc0osn9e5i6mb1hf3u1vu/61734630808.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/bebojiwapa.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/e12225e349573bcd7807485e70f9f715/67052372151.pdfIn PDF document text
    • 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_off0000e38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38F 18116 bytes
SHA-256: e88ca1a1ea8e414c04b1a778323ec95ba9678e45a73a38be70b66ede24d57e78
font_01_sfnt_off0001126e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126E 10596 bytes
SHA-256: c70d38a4a17cf6e999bc95d053b0958429e3eb92b8e9f4e8ab0755d4223ff162
font_02_sfnt_off00012ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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