Malicious PDF — malware analysis report

Static analysis result for SHA-256 0349b182a1c7d745…

MALICIOUS

PDF

75.8 KB Created: 2021-09-02 19:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 138624bf299e818336e0277c3782d560 SHA-1: c2c1b5ba27023459c5af2c5fe5d107678135a903 SHA-256: 0349b182a1c7d7453cf880f9c954741ef2491e63fa27593925459251bf0c6158
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a common tactic to evade initial security scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=wdf540padm+installation+manual PDF link annotation
    • https://ferdavagnar.is/images/fck/file/38176810207.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/fekodusoxonav.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/74496395695.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/notuzebepa.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/e8592cf4824ce8e3534b7513da205579/xikepugejo.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffc01de782---70797519792.pdfIn PDF document text
    • http://msiutilities.biz/documents/nenerezokiwedabazegigu.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b007db3ac33---kumurusuw.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/zigowedojokebidogisazasaz.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ecf70c15a---46427020085.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/2cbaa0069b6085e8d010308c86229b62/48648957357.pdfIn PDF document text
    • https://terracell.info/images/file/nuvojesemelikikinukul.pdfIn PDF document text
    • https://brickbodysupplements.com/newerac2c/userfiles/file/50638124487.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/pepexubojirubivazigodaj.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/xunako.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/8a17bf2db601973340a55bcfb258bb3b/63388032074.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/piwazerok.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/sajiran.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d977eeb43---51957815881.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607832373b674---wiwetodavesexureg.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/34780310792.pdfIn PDF document text
    • http://amajyuku.com/files/files/velun.pdfIn PDF document text
    • http://twothirdsmajority.us/clients/38522/File/zasosumupobigexedipa.pdfIn PDF document text
    • http://www.fotolia.com&#39In PDF document text
    • http://www.fotolia.comIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1E 16756 bytes
SHA-256: 9f166d0c71e60c47bc92ce46698123696242734b66242d660a6e56a0a9385197
font_02_sfnt_off000108e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 10856 bytes
SHA-256: 3eb7271264365bb54138ac28566d12a2e8b444a2f88950dd332689f26278c943

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