Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fd678112bbbd67…

MALICIOUS

PDF

89.0 KB Created: 2021-06-26 03:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5cff5dbf30c3d2b1140864f6e4d6f9f7 SHA-1: 067b36e5cf6f8fb9a28508201df101af1ef8fc7c SHA-256: f2fd678112bbbd671d1cd03539e5d7f6384c2bda8b1e32413f642f7c2037e42f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution attempt. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of 'cmdlptmiddf41c3h5q0lmf/pafogekoxu.pdf' and 'http://www.apsetivdavis' within the document text suggests an attempt to exploit vulnerabilities or trick users into downloading further payloads. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/f513b3aa8d4b22a685634ae8bdedd4fa/vulazedenijaputimewilesi.pdf In PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/lomag.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afedc23236---kimomusow.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c32a374bd80---74117518216.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/38573253418.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/1398287552.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/17496042127.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/38330899952.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/e031a1f5287f06d8abf88a0efb4fa120/83055080073.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/ed46f4aee00caca1ff06bb228fd47bd3/retenipebotusotedibizedav.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/47197032228.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91d395918---4998845027.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/9912680239.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/57f0cmdlptmiddf41c3h5q0lmf/pafogekoxu.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741adbbc1f8---lujemap.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16092ebd287cae---nexafikadatelu.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a983575ed4---furolera.pdfIn PDF document text
    • http://babamoleskine.com/files/file/ritezamuxive.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/40443785521.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/37733b500f29851404eaf92447aabe82/80112060559.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607939a2d862f---foluzozularurar.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a254c85e---sefuzunepi.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/35168353526.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e6c8b5c08---mutopubebeguzipan.pdfIn PDF document text
    • http://www.apsetedavisIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=mary+poppins+west+end+ticketsPDF 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_off0000f5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DE 18080 bytes
SHA-256: 1f0bda308da22031461934f033571de12749d38f6b805366203c0f9aa059734f
font_01_sfnt_off00012588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12588 10744 bytes
SHA-256: 6df9e65143896c3750509ce964226b27566f23aeb0d371e35f420b6efa2a9a37
font_02_sfnt_off00013e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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