Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3375a8e9ec9084f…

MALICIOUS

PDF

77.8 KB Created: 2021-06-30 06:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bae0ba9811caacc193c1e89186cb503 SHA-1: db2400c42def6617a0654b264be65e46e071ae3a SHA-256: e3375a8e9ec9084f85667c8991537e36312d176aed3337c24a619b017b862ce7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to numerous websites, many of which appear to be compromised WordPress installations used for hosting malicious PDFs. The primary purpose seems to be directing users to potentially harmful content, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://huntic.ru/uplcv?utm_term=where+can+i+use+my+skylight+card+for+free
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/148aos867schae8lg4l5egrnjb/40997352510.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcb53303a5---92338966549.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790a42729de---melomosewizosawovepuju.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/9f57addaf6c4d2e8e01a41c874b489a1/wekelafalulosozokutaj.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/niu0h2q2pd7cvia3r316k3ok76/78679030467.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/e651c53cce7586e3273621b0c3f242cf/43584769997.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ss21q1pbhgqcu2qi3tv72n6grv/wusotepalaxon.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d61568a56e---58817587645.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/59334936476.pdf
    • http://koryosushi.com/uploads/files/zirudezaguvojidisar.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075bdf539de5---75784941787.pdf
    • https://oncallanatomist.org/ckfinder/userfiles/files/metukizunonip.pdf
    • https://mygo.com/ckfinder/userfiles/files/96116952742.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/34e29508ce7eb58993b74cb5d5b25ce1/19884847191.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855b352ef63---sefibokinisoxuwu.pdf
    • https://ahha.az/userfiles/file/faserekimanokirumurozajor.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced9742f51---39102720601.pdf
    • https://dienlanhbachkhoa.info/upload/files/61634982625.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3b90906c684f23cc3be3d217593779f0/xegojorinesowurig.pdf
    • http://libertyquad72.fr/userfiles/file/70274418068.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609175d3f1ca9---sewuxeta.pdf
    • http://ceskylakros.cz/userfiles/file/15172599036.pdf
    • https://medius.sk/userfiles/file/24903051321.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_off0000cbfa.bin
a5ad255da3ebd57d2c9de5614977f97b9b6b8004d7601fd046181c612ea6df8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFA 11220 bytes
font_01_sfnt_off0000e5f0.bin
c9254be499f285e0f18b3a76aab10d32a32263f2648f435d3453ccb87e2db065
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F0 16200 bytes
font_02_sfnt_off00010ff1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF1 16792 bytes