Malicious PDF — malware analysis report

Static analysis result for SHA-256 9383dab14b57f8f6…

MALICIOUS

PDF

83.7 KB Created: 2021-08-16 15:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 86ecd8e03def42925a351f7d89ecb367 SHA-1: 4b36a26d3af12ba603c57abba22e70629eaced48 SHA-256: 9383dab14b57f8f6f94f51bde7fa5c222c4245f17d189ddc1279ae20b6b2752e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many hosted on compromised websites, suggesting a link farm designed to redirect users to malicious content. The presence of a 'convert pdf to word doc free download' lure indicates a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://cw-cut.com/uploads/file/dipaxuxasusabekujomivejot.pdf In PDF document text
    • https://summit-christian-academy.com/scauserfiles/files/19589828124.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/bexobolabivepukaveki.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161175fa69011f---63420039475.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/wevununaguvimesexeropig.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ca4dd053cefb1ddbb90fafc7d4fc3340/lobafojumukiwotubuzat.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/jevezagodisipogi.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/numefulatozakozefesorot.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/a77b015d13c12bc0b8f15b81134dca61/29822927728.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160718b780ac90---mitodekaximim.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/nakejixotirixa.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/27056939273.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/gowana.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/lipugabexesizisu.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/3fgsohhs268tmfk2p92d44l9u7/puzakapubojamaw.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/3082021986.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/bewowelinitakisuvi.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/26942671798.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/sevekugubonigo.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/c53d2bc2eaa9310845cb7ca81ea4e820/losalawodukedilobozuzifix.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/gonudofotu.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/15938768442.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2nger26m8aro6ioin9ulbio9f0/84718960713.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/bibomalepotozukokeg.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/44458633039.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=convert+pdf+to+word+doc+free+downloadPDF 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_off0000e2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C0 10536 bytes
SHA-256: c1f084bb948a2d33807e9f6706e84957124bb99a3db75875d65cd6e83e6f087a
font_01_sfnt_off0000fb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11313 17268 bytes
SHA-256: e745d52683ac3ab7109e6da1adaf411fe801f150a40a9d932efc79f7368d4ff5