Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee9849d36348a7a…

MALICIOUS

PDF

74.4 KB Created: 2021-09-20 05:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f5ef2181a9cd8a07609e53398a7b07c SHA-1: adae13d9ec93158bfb9e7d62936d9cea9161cc7b SHA-256: 7ee9849d36348a7a7d5139be80db8ece4de9bd089996d2f5b0930ea95c106aca
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to potentially malicious domains or are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to external resources, aligning with phishing or credential harvesting tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lederstuehle-shop.de/ckfinder/userfiles/files/nitobazefenovesebo.pdf
    • http://onthebroadway.com/CPD/adminpanel/upload/file/8263876448.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/7t46ifp2br8c5npoe46s9sqbrn/pimovadeziv.pdf
    • https://venus-forever.com/image/files/86102897604.pdf
    • https://habibitours.com/ckfinder/userfiles/files/22962107870.pdf
    • http://okfilm.kr/userData/board/file/8859421542.pdf
    • http://domadoma.cz/userfiles/file/56978171536.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613f11e094be1---53009246519.pdf
    • http://studiolegalebisantis.it/userfiles/files/sijolobutoro.pdf
    • http://zdravi-kromeriz.cz/files/file/jekajuwoxuz.pdf
    • http://vkp.ru/upload/global/file/batemu.pdf
    • https://ph2020.org/FCKeditor/file/26480136312.pdf
    • https://laznia-radom.pl/userfiles/file/vixukorojuromebet.pdf
    • https://tenfci.org/userfiles/file/fekixoxegurod.pdf
    • https://artasedanasingaraja.com/uploadfck/file/pudopig.pdf
    • http://uktohabbarijamalta.com/files/file/43445751197.pdf
    • https://taucaotoccatba.vn/images/news/files/polisibisaka.pdf
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dipuraredere.pdf
    • http://tvoirostov.ru/ckfinder/userfiles/files/tuvazikajudogoxujij.pdf
    • http://kxqcgs.com/filespath/files/20210902082903.pdf
    • http://saeronbio.com/userData/board/file/ripawuxujezukix.pdf
    • http://yljczl.com/uploadfile/20210909084557480.pdf
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/50176282354.pdf
    • http://studiostocchi.eu/userfiles/files/77168646850.pdf
    • http://pr-jam.com/ckfinder/userfiles/files/lonafafizapetobani.pdf
    • http://vino-charlie.cz/userfiles/file/68242927916.pdf
    • https://stradatextiles.com/upload/ckfinder/files/91350340872.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=lightning+link+free+coins+links
    • 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_off0000c113.bin
ec15ee4685210772beb44bfee7f8dcab2d005068a631576d3683d932da2386e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC113 16680 bytes
font_01_sfnt_off0000ec3e.bin
9c05ecf95c67a99fea8399b2dc3f5e0c183fee37dead9d1ad640d3239b9bcd2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 10504 bytes
font_02_sfnt_off00010408.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10408 16792 bytes

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