Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff00ae09ec29a5e8…

MALICIOUS

PDF

84.4 KB Created: 2021-06-26 14:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92fad0df231e06c1d5d09a546f56fa8f SHA-1: f2641d43de26338ae836f57ecc3df411d20e9fde SHA-256: ff00ae09ec29a5e87a45210e3ed0ae7f23f887f8138948338a93b23fa67f9196
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting, aiming to trick users into downloading a secondary malicious PDF. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure suggests a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/kejalube.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/ikir5gha7qnc1cupqn24lfocu3/43538418641.pdf
    • http://ibtaker.ps/userfiles/file/lodepunuvaxo.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/227d7b30c43e06fa9f9ca9408cd3441b/53994151469.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/eae736f001cb9d2bf4a683681ad46c81/rodagepal.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16091371f1f462---kopenevojapojufaporoxiba.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf43e3d44---4407906196.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c55173b7d93---79794879262.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/gererolawibamejuvanezo.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/0gfpbi1ddamojo4na7cacvfofb/71729847524.pdf
    • https://manenshop.com/upload/files/pabizoxamexapenow.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3f461597870214de237783aaceb38d37/9893877681.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/13fd808d74e21dd20a3966ad51f53e6d/59572818707.pdf
    • http://flirdining.com/uploads/files/ponabixejubetugibosilina.pdf
    • http://nsdadventist.org/FCKData/file/mufawonidesofewodumo.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093d2de5fa7e---17231806865.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d34de9a051---fizijakuzuvupukitawu.pdf
    • http://avsa.org/sites/default/files/images/files/binenezes.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160838213d1c4a---donipukapuzolifakit.pdf
    • http://vstarmp.cn/upload/files/20210613_064616.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c015c7847e---sisosob.pdf
    • https://calendarsunrooms.com/userfiles/files/24815737854.pdf
    • https://eyetracking.pl/userfiles/file/664291674.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/a5b8d5c54ea50dc363eac6ee6a4d625d/54256193897.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb00f99a899a1c805b7797af853472ac/26340341359.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/b07eacc8c44094ad9286cd827f45b2ea/xugalonejirafulezexofezu.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/2366776f6ad4b8ab04bc37179d0e2ea7/totitosajid.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=male+calf+muscles
    • 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_off0000eac0.bin
248f6f3814267adc47dec2e9ee81f5afa54835ff2373eb510731edc0150e98b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC0 16596 bytes
font_01_sfnt_off000115e6.bin
ed1a4fc93d460048b8665c6313b1082f60a0ade54c71a7402950930106342aa1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115E6 10076 bytes
font_02_sfnt_off00012c64.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C64 16792 bytes