Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f47924ac9bb327…

MALICIOUS

PDF

79.3 KB Created: 2021-07-08 05:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee7d1a598771aaf62cbbeb96188646f7 SHA-1: 849d707bf1f56a209f3317c147d9159a853a3ec5 SHA-256: 15f47924ac9bb327e98271db570cb3f1576297783f729b62af3cbb55a56ac35f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/u44u9bl6m18u5fa15fs1pe1oq6/kusatuguwetidut.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/dg0etenda1u4krd1b42kuorg54/77785652883.pdf
    • https://szaniterplaza.hu/ckfinder/userfiles/files/72893061478.pdf
    • http://www.zywawiara.pl/pliki/mifutavoniraxuvotilikapo.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607953306a31b---9845204623.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099050305032---rusunox.pdf
    • http://yjsyrj.com/userfiles/file/robisimemobuwawomeri.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/e805f14591584e70e578542a7bd027c1/turupedaxalatixenokazedal.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081662ff2ce9---dasigavadadigolunobi.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754ef64e047---3724478506.pdf
    • http://efuturesthai.com/uploads/files/demasaleravisekenan.pdf
    • http://mwflower.com/upimagesfile///jonusow.pdf
    • https://fajanav.com/aym_image/files/90639176773.pdf
    • http://clair-environnement.eu/catalogue_dynamique/file/pebuvudigizosexafemofo.pdf
    • http://alexhoffordphotography.com/temp/files/file/xumezupexunufebewur.pdf
    • https://accuratesearch.com/userfiles/file/nubikesojagufaxus.pdf
    • https://fanaf.comarticle_ressources/file/58606012631.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/b3ede34166e359c463d89d26e858b012/56260457905.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/91027724509.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/6df80bbd1e3113af084ad8bc24a117d6/55656410967.pdf
    • http://progfin.pl/userfiles/file/kagixixawodal.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/0912953948bf2730f5a33687a4b28bf3/samatakido.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/8480994980.pdf
    • https://alutat.com/data/file/59941333685.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=you+caught+me+meaning
    • 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_off0000d508.bin
7fb665b06e36a1ef3a7ecd2869d00c199886d6d08285094ec25512dcd44b87fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 16788 bytes
font_01_sfnt_off000100d6.bin
2f52e212047dadf9998429f7901013fe996c2823a2cd9551c6ca5b24c2240079
pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 10448 bytes
font_02_sfnt_off0001185c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185C 16792 bytes