Malicious PDF — malware analysis report

Static analysis result for SHA-256 804ba0f9c0c3c389…

MALICIOUS

PDF

89.6 KB Created: 2021-07-01 14:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3dd17ae2e9a6273a2c930cf886eca233 SHA-1: 6cd8805e4fce2cf0c561d139585eb53e20fda8c3 SHA-256: 804ba0f9c0c3c38912cf8f465cdd37102266bd8cf88f740823aa633d89fc52fd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malware distribution lure. It contains a high number of external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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://teormech.ru/teormech/usrimg/file/xemexijafimofaluzizusogaw.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d79656b1473---98820037142.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a1b408fdb481b880fe78f45c85eac241/zewufepug.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0be2c2cf77---zolomuwawurelomekef.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/kilevamiw.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/masururanetijavifemonizew.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6a6902d0eb828b19518334e43c5a5ed1/ripogewunawit.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/nedojifefopodos.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96fds5bchkbe61qd1rn0orbjv5/50624340564.pdfIn PDF document text
    • http://faradbox.pl/files/file/88053192082.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf7b1872ca---vigixomuguloronilemaj.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/j1e8juo8lpdqpkdmrv8p52i1si/zuzegoturolo.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608d88acb7074---tubebajosafubumokejodut.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608303ba0e676---lejokagovezonopure.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b34621ec170---lofufimivafumoge.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d1ec1fc89---23516293512.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/57037881415.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/giwuxapuxuman.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9ee0b442f2---midirefisa.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/kerinojifewupokigegizilu.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/f7ck7pda2hl8ofrrb4ppfs5cu4/67188691471.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/fosujubonozute.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/nevekosixex.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c0daa2253---66564244115.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/kufavitoxadameketut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+many+years+does+it+take+to+complete+baPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA5 16536 bytes
SHA-256: 6541236220845a5b86d333ab9430be8724ca2e3cdf7a51d0f7e909a72d8ebf8a
font_01_sfnt_off0001272e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F45 11100 bytes
SHA-256: d79756ea12fe186d50630816a44e17b27cd4f896eeadcadcd8a3fdf07b23269f

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