Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2d12f443292554…

MALICIOUS

PDF

89.4 KB Created: 2021-08-03 16:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f62b977f09eb121399dd60db95571389 SHA-1: 3e087fea490d06ab614b225eaec0ea9b493e76c8 SHA-256: 5e2d12f4432925540c0fa27c07737a4274d6b4022834f932a6dd4032649aa253
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress upload storage, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://krisoc.ru/uplcv?utm_term=how+does+tropical+cafe+make+their+smoothies PDF link annotation
    • http://dijladentalcenter-qa.com/userfiles/file/23708327458.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20217591201155.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/4b19e0abb50c43d74d39062cc2931a05/84113820913.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/375ebbb9aec2cb629fef9e2de8ee5a87/tadilatapagawerux.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/dizavabuponarivak.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/matikegowafaketopemuza.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/egbtja4rt0ktumjl7uhjsuf3ep/gamusunomidimusugisir.pdfIn PDF document text
    • http://17njl.com/userfiles/files/83768053072.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb0dd23ebd---75510169022.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/b1b9247cfc9a4aea7319532573d44c83/luzupibumapuzur.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/57494799315.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/34108f0e4869140616b062ff513c8810/sesewi.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/3752315af95e8585f669252a41b348f0/wazamanotaraxasuga.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/a900cccbd98ce17697df3547d1fbdb94/48414405205.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/lirumurewawo.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/31801879666.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/46de167551c44fc4ac3fa7caa36ed028/38572123745.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/furebedikeniboxuluta.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/lorelewidaxatonare.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081b847c3c64---bifafi.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce705a4f36---visusofupenenirapijor.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_off0000f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 17628 bytes
SHA-256: 46f94e6867aa1341c041b8f4c39fb8d67dca8dce33a7b8b3cae8e64d414183a6
font_01_sfnt_off0001245a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C71 10948 bytes
SHA-256: d2ed50834cbb9200147e0be133e2c7bd711cdfe661cc89cd9589c2ec7125e591

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