Malicious PDF — malware analysis report

Static analysis result for SHA-256 9236fa106d0b29c0…

MALICIOUS

PDF

96.8 KB Created: 2021-06-27 23:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6d05bcfb2763c9e28668654c4deb87f SHA-1: 14ce4528161911eb19e528c56225edbbc5b0bcd8 SHA-256: 9236fa106d0b29c0eacb5feac6df1004fd63483f7d6874b673c4e031587627ad
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the heuristic firings strongly suggest this document is part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

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://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16095d3be1f9c1---lazagikuremubewopatonude.pdf
    • http://www.deep2001.com/images/library/File/dowatomapawavupudo.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/24cd1897d838c955d52e73b96a351a61/60682032901.pdf
    • https://kovosluzba-praha.cz/res/file/xolajumoge.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/ba7e997f9e52b46efd3d8f4d653d64f3/kitaranatezugumi.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/6afq5rjbust2hbq8g7ec7mf934/42366764522.pdf
    • http://villabrown.it/userfiles/files/71330477594.pdf
    • http://steakclubhn.com/campannas/file/75264255950.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af99e44074b---gejowosenowelogijuj.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/17df55b89118b7011caa5191e5cbf24b/kavuxejiduze.pdf
    • http://gerd-pollak.de/userfiles/file/repodifolemogufe.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608609720a1f2---dufodaditiwuwitubux.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/4d9ob7dgrrs16t0nshfvf4fl3u/20874823091.pdf
    • http://kasargod.net/uploads/file/984014575.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/345dab9f478e872dcc34aed72ede59b3/rirokobabumerek.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/bb852a49h33gfeqk4q9r1m2fnc/88810024955.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/bca19ecb3a20aa8b01be11af3b189435/58151732870.pdf
    • https://podereilmontaleo.it/writable/public/userfiles/file/28197885435.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/96fdd85ab8050bd034c460944774c999/24299262105.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdb6088130---77037657457.pdf
    • http://quickvideo.nl/userfiles/file/5139987954.pdf
    • https://alutat.com/data/file/rupifo.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/af6c1d2c9418817cf9ab4032e27ec79b/91108013490.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077105773836---pofuridusopudevu.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ddec07608---ginijikixenomijagilu.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606d01100b9d9---fotowixedatonovab.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16096364c3c4e1---buzujopido.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=mass+of+112cm3+of+nh3+at+stp
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 16792 bytes
font_01_sfnt_off0001159b.bin
ac06b67ae97e70be6080d88ee31be1bc143a4ba251641fcb62bb345d5fe5684e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1159B 10712 bytes
font_02_sfnt_off00012e37.bin
0e7dabf8d6b90c49c46942f6ebf7437d04940b8a20f147a634743adcb1f94236		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E37 18204 bytes
font_03_sfnt_off00015e3d.bin
5f2a87ed485690ae99dd00ffd3dad57dcaf6de75c4981ecbeeee12bb760f3f7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E3D 16144 bytes

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