Malicious PDF — malware analysis report

Static analysis result for SHA-256 579012b4eadf667d…

MALICIOUS

PDF

83.2 KB Created: 2021-09-08 08:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 665d6f8e80353dbfef73f7cee00359d7 SHA-1: e57d50030836ddd5eb67b99b48a7e15b5fc94cbe SHA-256: 579012b4eadf667d17d96e0e294a99cc2f5c54dc516adf0d86630d19b0bfb7a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and numerous external links indicate it's likely part of a phishing campaign or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://tcurryproperties.com/konadnew/userfiles/file/sovanaxelufiwaxapesowes.pdf In PDF document text
    • http://tobn56.com/UpFiles/file/88010500214.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/10408284100.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/99884450925.pdfIn PDF document text
    • http://globalaircrafttech.com/ckupload/files/10135739443.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/38973067781.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/mjahq6r2gp5992lv6js7qkcg55/sijiwowukiwafujeneziganut.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/e05fa756e51d0b59ddeaa4153e90ecee/86264603842.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/7010ea91ff61c1751555e557e1f5e2f8/davupeduti.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4eefe4d9dc---86946169955.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/gubozu.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16129382abd766---tepikadutowodazowal.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cf5315b50---20937048608.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/dobijutofozonowenup.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/90828477496.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f8848c42cbfbd6d10c0963cdc86040e0/sudufuv.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/33791510184.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/116610a87d85c9538e1e0b39a8729144/78354722770.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceb6aed10a---miduroxu.pdfIn PDF document text
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/45598101390.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210626_F62E8494397FA0C9.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/be55f310f50e66b9cebaa794af7ea2a8/rijigitafiwedirameduf.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/bb12698efae09a18d29ac4935db495fc/95187640666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=phasor+diagram+rlc+circuit+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB64 10932 bytes
SHA-256: edef5e47d6e7c59aa5075ef16cb7c6eabe6eda4a4cc23ad009a7768eb4bbee54
font_01_sfnt_off0000f486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 19432 bytes
SHA-256: 7f49af00dc5c6c00172b69662b3f6fdbb095284446f8bfa10aaa341b0cfea7e0
font_02_sfnt_off0001275d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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