Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ada03ccc7f84781…

MALICIOUS

PDF

86.9 KB Created: 2021-07-25 17:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2091417994f6c00e4304fcec530f517 SHA-1: cf8e728ddc2a03ea40dde6ddc5e71021d41b3c58 SHA-256: 0ada03ccc7f84781f21d0a240038a96b5e0ecd7ed0a88b17f5acd974f2c01eaf
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://alnadaoil.com/userfiles/file/vazaxiron.pdf
    • https://doanhnghiepvietnam.org/img_duhoc/files/nopejukatifodokanurag.pdf
    • http://dijladentalcenter-qa.com/userfiles/file/82110054543.pdf
    • http://kielcenoca.pl/files/file/45081288436.pdf
    • http://currycornersugarland.com/admin/images/file/sipufuzajitodofirezaxoxi.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a476d1e64---mamox.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160946742cc1de---saguxuwasibar.pdf
    • https://ei-hotel.com/free_images/files/50363523860.pdf
    • http://volkshilfe-ktn.at/images/content/files/kuxunomexupepilepepa.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160e071402ed25---rarak.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/eavfotic1hsitf98cu66mjnsd2/1754066579.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac81390a245---66437275833.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160eca7b168e8f---tamexokam.pdf
    • http://yongqingtech.com/d/files/42951793159.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c04c804abf5b9fbd3cfbcd70d568e7b3/jefudesosironaxaridexo.pdf
    • https://asset-books.com/userfiles/file/pexenunalofelezodaduxenub.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8c09b17a9---89436412765.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721fcd72637---dimomojenobunuwejiganaxod.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/m3dn0hkqk6chs2sle4tjj6nam9/76207812465.pdf
    • http://cameradungphat.com/uploads/files/77336239440.pdf
    • http://toyteepee.com/uploadfiles/file/210509165214400045bjvkvx.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/7163ddf394729595b207ac08d31db53c/43710806419.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160fca273241c9---12402772509.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=best+battle+royale+free+to+play
    • https://mediaget.com/userfiles/files/xukagerilasadovej.pdf
    • 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_off0000efbc.bin
38c05829086904c05812ea513736f58eb10817748711f1dc0d8356d64471fa86
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBC 10464 bytes
font_01_sfnt_off0001078b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1078B 16792 bytes
font_02_sfnt_off00011f9d.bin
470674201445c9853c235df7189c96dfebc40bb7b54d7102b526eb5634c26129
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9D 17444 bytes