Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3752366028d9ed…

MALICIOUS

PDF

96.5 KB Created: 2021-08-01 14:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15ff56e591bbe19e3eed68176250489b SHA-1: a13988824d9dd0a2aa3f818f2b9da3098df98838 SHA-256: 7f3752366028d9ed5df94160a254cef601cf148c3acfbc581e7351b0cf568e34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104d7e14cb10---48492171280.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/bml1rrj0e070fm52nglfnp5t8k/vawokexu.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/toropizuretezulelefi.pdf
    • http://hersheyhigh1981.com/clients/37302/File/61853096075.pdf
    • https://aplusadvance.com/naver_editor/data/file/21345855747.pdf
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/43055708960.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/88021504997.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783357e0576---defetozogavol.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/cef9c1f19e71aa05ddd91247e64e4bc7/wugiwederekakigijeduxana.pdf
    • https://vivaldiroberto.com/img/files/mediafiles/file/berod.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/d9597844d90c47f8c76f6ee273a3042f/90801071107.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/82e2e1ba350072b5026462e1dd1539eb/sakofafezarimikovakozef.pdf
    • http://ronaldtan.nl/images/photo/13378686406.pdf
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/81751131654.pdf
    • http://aromaonly1.com/yamituki-n/uploads/files/vujufiwakelawedobe.pdf
    • http://jumpstart.mobi/ckfinder/userfiles/files/jejiduxukenavugitus.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/94c798264d8f45ada8616e48a0bb7a80/25685882963.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c34809e771a---89008087972.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/03dc05a4d53f607815a5eff245f565f5/gamujufokelizisep.pdf
    • http://sun-green.nl/ckfinder/userfiles/files/13013429770.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a055efb5a---99344410875.pdf
    • http://toyotarent.tw/FileData/ckfinder/files/20210620_DBD1F1B92451C858.pdf
    • http://carzip.biz/files/uploads/files/kiloxir.pdf
    • https://eventaipei.com/upload/files/54154915289.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5827c92e5e---nedofe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=free+compare+and+contrast+essay+outline+examples
    • 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_off000116af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116AF 16792 bytes
font_01_sfnt_off00012ec1.bin
a8673804a5c93fcd5a11a37114069ccde6511acd15d1937723c6616808c7bb75
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC1 16984 bytes
font_02_sfnt_off00015a36.bin
e5ad9c43b1967801214f01c6e027b71ab5024dbcdad5bccbb95cd2b229a53c1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A36 10968 bytes