Malicious PDF — malware analysis report

Static analysis result for SHA-256 a517daeed459d2fc…

MALICIOUS

PDF

68.6 KB Created: 2021-09-25 14:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b45410bcec07102b302d27ae83953932 SHA-1: 22d7430c6c2333cf449cb998c2cd5df3d0881029 SHA-256: a517daeed459d2fc18b6e45ad8065baec2bf3aa646a168363a1b5388f0f1155b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://foulardfotografando.it/file/davupedadisopegale.pdf
    • https://balaji-technology.com/userfiles/file/80414126317.pdf
    • http://osingenieria.com/images/admin/file/pepofigosewulisaju.pdf
    • https://kristaldicarlo.com/userfiles/file/gopegepudedivonozepi.pdf
    • https://alarouba.com/ckfinder/userfiles/files/wusabezabeloxipoli.pdf
    • https://ryokanclub.com/FileData/ckfinder/files/20210901_561F7F2366342EEA.pdf
    • http://oa30us.com/userfiles/file/51901934548.pdf
    • http://lesmashclub.com/imgUpload/files/70534138754.pdf
    • http://twtqedu.com/userData/ebizro_board/file/15065670492.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/eud7e6evta6vkd5uof7r1hmug4/wisulupewunogidi.pdf
    • https://artcorner-fiberglass.com/userfiles/files/gewetalinatobunolowaf.pdf
    • http://prochem.vn/images/uploads/files/18867616446.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e6dc7f3f5---nekimexoruru.pdf
    • https://mirrorlink.com/public/files/files/dijojazakenotererig.pdf
    • https://inprovitchile.com/ckfinder/userfiles/files/80629614791.pdf
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/lovifagenexeku.pdf
    • http://mariancozma.com/_user/file/bovitutamerevotobazuzug.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e61584cec284bf861895d505e6bd9257/6194819290.pdf
    • https://tradingphrases.net/userfiles/files/xasexudaraz.pdf
    • https://mwasafat.com/uploads/files/xovesobulu.pdf
    • http://lideparts.com/userfiles/file/1632462838.pdf
    • http://verzorgingsindex.nl/images/uploads/lavajuribeg.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=blur+android+game+download
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/61182688219.pdf
    • 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_off0000b0f7.bin
dc7514d8be2d300159306d7cb69363d173fda41476a71bfe2e4bd37231c58505
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F7 14384 bytes
font_01_sfnt_off0000d4a1.bin
218e97255b868dbd51c9a905b2d65318665ff6f31dc4f87b9802fa1cfa166a02
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A1 10564 bytes
font_02_sfnt_off0000ec7f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 16792 bytes