Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d69fc43f3a284a4…

MALICIOUS

PDF

89.3 KB Created: 2021-07-04 11:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5195888ac6b60cdbc1270e82d6f0572 SHA-1: e187d6e9b19236f13515521077422f8f2fe7881b SHA-256: 0d69fc43f3a284a42834db58fd425d7a2f2138f791890a09e22db44a5c72cfa6
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or malware distribution.

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 http://dotacjedlaoze.pl/userfiles/file/detasisewevagubawozisop.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/88e2c11a1b451d6baad6c1f8090f5da1/68631565205.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb988bab31---17553989986.pdf
    • http://bahattinburyan.com/userfiles/file/fewinesexufi.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/34deec00b6ccdff169afa6337b4b4569/wimotavugitijorifafut.pdf
    • https://masterjobintl.com/ckfinder/userfiles/files/bofimekuxebapakobotudow.pdf
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xijagu.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921e8368117---muwunajop.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c888d8a1c08---64476927167.pdf
    • http://thuduchouse.vn/pics/file/dozakoxafurebomejapitu.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c15678aabc8---xanatibinesukova.pdf
    • http://www.mustwalge.ee/data/content/files/63683566447.pdf
    • http://omonetach.pl/foto/ilustracje/file/75677132829.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609197d7f018b---46225892008.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/83806264790.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cffba737b---muxugev.pdf
    • http://slp70.com/clients/873855/File/tivuvesasajariramewilimuj.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/iv63ag9kuh4159ghp8ihhe6d94/10260347233.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/f022588a035dd6a133505604b5f056ad/2646007226.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/88545701c94c66b7633db3838a194b2a/segevuvalifig.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606e36e694672---gifefazumatogo.pdf
    • http://akssert.com/userfiles/files/93046802426.pdf
    • https://chief-moving.com/editor_upload/file/91226991912.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=first+aid+on+hot+water+burns
    • 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_off0000f7c9.bin
2dbd8b4240fd196475bf319998b072f61dbf00316b92a50c91598ee542be3b53
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 18188 bytes
font_01_sfnt_off000127af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127AF 16792 bytes
font_02_sfnt_off00013fc6.bin
f07b7683a6139c91b9c4c4a9b7449a02dd51e1ac29b6912ce81cafa2eec8f0b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC6 10604 bytes