Malicious PDF — malware analysis report

Static analysis result for SHA-256 1deee1815f0a2a0a…

MALICIOUS

PDF

70.9 KB Created: 2021-09-25 22:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe0e042c303886e5b79cf4084b9df656 SHA-1: 4f9cd7790c14bf44c00f9fe4a1d4d6af08478b7b SHA-256: 1deee1815f0a2a0a955fc3e361374b23aefca2c3565675399771d9e9a2812ff5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145a1cf727ed---20952059767.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bcc051334---vugebadizavenuru.pdf
    • http://abwingstop.com/uploads/files/dusujesedokinazelojabo.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16148b239c8cf0---64744788610.pdf
    • https://edusfera.pl/upload/file/44078505731.pdf
    • http://clerus.hu/files/file/texuvotitijaf.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae9dcd6f9b---xuxuji.pdf
    • http://energo-market.ru/sadm_files/pamipojumopagodava.pdf
    • http://kulturazebrak.cz/userfiles/50592411092.pdf
    • http://anhuifan.com/upload_fck/file/2021-9-22/20210922044333194308.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd4ab3468f---32340543216.pdf
    • http://stonebreaker.at/10166495630.pdf
    • https://xo-sound.ru/userfiles/file/53626548271.pdf
    • http://myblindz.com/fck_user_files/file/44757231668.pdf
    • http://toptoptraining.ru/img/upload/file/zosapugegasinaxopizeze.pdf
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/43855685294.pdf
    • http://jfhcoaching.nl/userfiles/files/wexuwujo.pdf
    • http://thoitrangvabaoho.com/Images_upload/files/46480215755.pdf
    • http://levant-tekstil.com/other_files/File/71362038441.pdf
    • http://studio-orlandini.com/userfiles/files/77263901620.pdf
    • http://ekvatorbl.com/userfiles/file/dofanozotofadejevova.pdf
    • https://doanhnghiepvietnam.org/img_duhoc/files/doxumido.pdf
    • http://sh-ruiyangcpa.com/userfiles/file/2021-9///2021923027542023.pdf
    • https://aildf.in/userfiles/file/47799234802.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/7fd2aa194209dbf7240f923e26618acf/lufafilu.pdf
    • http://analogsys.com/uploaded/file/10120395556131aca34bb13.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=top+war+battle+game+account+for+sale
    • 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_off0000b2f8.bin
a47a15a4da47294c62ffea50e4254b1017a5065c8824d4589bfd3c4584a1948d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F8 11020 bytes
font_01_sfnt_off0000cc82.bin
682327293ab8fdcc6a422976748dc5680c41f6bf14ab0300833a46b5e45571e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC82 15644 bytes
font_02_sfnt_off0000f43a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF43A 16792 bytes