Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a175f2bfda4b409…

MALICIOUS

PDF

94.7 KB Created: 2021-08-01 02:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 974bbb40829500da1211bbcd3ad30efb SHA-1: 7a7cadd87220fe289934aeee90ebe744af38fd77 SHA-256: 6a175f2bfda4b409727c44a2097ca72a26f266c628949516eb455ac5f66c009c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://premium-t.info/files/files/8282062550.pdf In PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/9372d67de5e4a3ad9fc38ea081c62d95/19949372728.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071f20f47837---52070114909.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/9flsvuv8pegpndac3v2fpgqgti/gegolesajivog.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/91835971786.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3618e7ae5795cdd5bab3aff43615ed52/wodar.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/vojijipixeza.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/09ccd9226c5922002235ff4caf3eacc6/melimezenidekijukuvuvot.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/24626119357.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/84662522331.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084982c295b6---35581106569.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/ccac712a35be1ba46dbc366a48d283fb/11490226742.pdfIn PDF document text
    • http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/fuwoxoxuwim.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/b2216bf7be978206b873c13fbb9b7c10/jifigubovojife.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9877f5b207---gefazosexowifivo.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609a365f9c185---bixeje.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/fi8m44erp121u8okoosf9h3ol2/fugezozedetewukilukemo.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606c761aa6a46---befifagumorusuk.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/46045087139.pdfIn PDF document text
    • http://santeh.md/img/files/gopuni.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/mejizapoluselapixew.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8d9ee6cd1---doxobupadigupixemafaba.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/28048838893.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/sl2pamj17qkmpvak81877m9btp/4114305687.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5949630f7---697072025.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=anket+doldurarak+para+kazanma+2020PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFA 10768 bytes
SHA-256: 6bd79f72b4b5fa68e83662ac42b52d1a69a1267c83a941080c4ec847abf23508
font_01_sfnt_off000124dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEF 18376 bytes
SHA-256: 605cc058241926dc8eaf747e4fa4c8006d95801340ad215e8819c4fe65723043