Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f959af4f370a21…

MALICIOUS

PDF

87.4 KB Created: 2021-07-03 06:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90027db745d366254f1bf4df2e912b2b SHA-1: e9dcd9f5e9fc8e7b73034d94a7a28c8e972a1141 SHA-256: 75f959af4f370a2106809baa755fa28f0a078201cb07c2d37119dbadc595b03a
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to other PDFs hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The use of raw IP addresses in some URIs further increases suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wsp.pl/userfiles/file/gorotiwepuxuwobo.pdf
    • http://happinessgown.com/upload/users/files/laxedonokaguzetakopux.pdf
    • https://sakkestadbil.no/userfiles/file/rufalesevixonogozarotado.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/r900e2n132tuvn1qjksm671oq5/pixivanudufujetilumubopud.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160848139b91ea---badowal.pdf
    • http://allycatering.com/userfiles/dewaxajopekixebivifuma.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a281b3cfc2d---85119285852.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074a161c36e5---97720648333.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800539e31af---33996256983.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/v77o1t957ak4ds3t82ada20i10/ralosafonevewotosibuwufun.pdf
    • https://wotfiles.com/ckfinder/userfiles/files/zebapitiza.pdf
    • https://equantumconsulting.com/files/files/64797102294.pdf
    • https://soalmatematik.com/userfiles/file/fumakebevuzanitefagudu.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/3j977b615cgtagud2mba94f0p9/3864178909.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096baa652771---86530779492.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b0dc0d8e4---pobobusunizonagaseb.pdf
    • http://zgkimsteszew.pl/img/upload/files/52530809905.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160902904b29b9---lisijeziwenotitavutofajiv.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607304b17a884---zanodexifejavarudolem.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b46661f10---wukaw.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/u85pobear2g6j954r8pbod0deh/39308989740.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/a6ubhkrv75c3d4fc7tinaqd9gq/tegojuvokoduvefibema.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/9dfc08cbe572cd28113d3c856a583f78/budozenibogizosag.pdf
    • http://ahchala.com/img/file/58955838192.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/e7b982b0fdca09740f39e4cad67edfc4/50251321122.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=explication+of+concept+paper
    • 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_off0000f512.bin
c13625d7173e332b2fc17dbeaa04973bbf9e77adb7458d836e7e54c25dd367f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF512 10388 bytes
font_01_sfnt_off00010cbc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 16792 bytes
font_02_sfnt_off000124ce.bin
614ace6d67358bbf6ee1f2fd6223a84e0cbd020bc738b3f25784c4bb537d44af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124CE 16732 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.