Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc2384e9b238f3a…

MALICIOUS

PDF

92.7 KB Created: 2021-09-03 03:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5ae75f24a9ab2a713508a4c8e16b5642 SHA-1: 2dc664a2f21e0b4ec476ee34d2b7a593beef720d SHA-256: 6dc2384e9b238f3a11d710adc8dc0eb77fd2f438917cc873aec85ef723f28e97
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://cipetbhopal.com/webimg/files/23185645697.pdf In PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/xomofemitibe.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/61348329929.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/80654406043.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b50cebe950e---58873111298.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b896542174---tozatoxamometidogunesazir.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/38699034795.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c878090bd45---jipuzotofabor.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/90204721252.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/efr8h8m7bjvfecp0j8pi0uumh0/gipefinelofetubakig.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40b6fb1a97---fasese.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/mepoxeranelodu.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/61f329ccf8f11c4a3b875bf19802eb5c/57185414964.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/559431c6875813b54047754cc967fef9/44183221790.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/2cfd2a3f66f62a4525052d1f0cfd9ffb/72018241698.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/xatemefojegugajelavuvi.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/ruxutamifoke.pdfIn PDF document text
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/96243371413.pdfIn PDF document text
    • http://askort.pl/Upload/file/14749508405.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/64588349679.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c54430108ec---32629244694.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/0739448a68f9c46877d9c8af0f6d5103/gamunerakeparurugon.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/937edd17497b33773e2a18b695966bf9/xipoti.pdfIn PDF document text
    • http://repositorye.uees.edu.ec/123456789/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=leucemia+mieloide+cronica+pdf+2016PDF 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_off00010001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10001 11036 bytes
SHA-256: 7e5ec6ba7a673ff9927132da53419992a3fe1565cb85978bb4e89afa2fbd27af
font_01_sfnt_off0001199f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199F 19568 bytes
SHA-256: f8dc8bf8dda38393d4f6a7ffb0b6f718e4298cbc55aba45fa514f24dfe30aa37
font_02_sfnt_off00014cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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