Malicious PDF — malware analysis report

Static analysis result for SHA-256 200f85fbf5492e39…

MALICIOUS

PDF

83.6 KB Created: 2021-09-01 16:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 241b1d8fe2cf4538dee6d7492e5b9d16 SHA-1: 15936cd0851ba8ae7b6d13ffa010bd4cd6ad44d9 SHA-256: 200f85fbf5492e3995c95d0e3aa9ea60c5bfe09fb5c19f73b0fe54997372cd1a
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, flagging it as a phishing or trojan distribution vector. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest a coordinated effort for SEO manipulation and user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://pixomot.ru/uplcv?utm_term=how+to+make+a+bucket+of+lava+in+minecraft
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c98b73359d7---83661099830.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/5f4aot13f4g4cenfk5vnged21m/berozajilela.pdf
    • http://creativetechno.in/userfiles/file/56365014492.pdf
    • https://vanvoorst.info/uploaded/file/xosajexufu.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/8h74sn13fpndv33pgre00v71q2/muxujuxasubugu.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f810581d506---bomejivowupuxixatuk.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bde0338427d---4386706021.pdf
    • http://kystar.net/filespath/files/20210826131932.pdf
    • http://auburn-properties.com/userfiles/files/nubuxisi.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u55ts6798t3js9n1pn8lov6s35/86776297473.pdf
    • http://melabo.com/upload/files/22272232332.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e267e920447---4403582778.pdf
    • http://rongqichem.com/upload/files/ridawa.pdf
    • http://tuzvedo.hu/elemek/file/46487886433.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bf13a93cddd---95991653752.pdf
    • http://orderbestwings.com/uploads/files/bofazajusofafofidowu.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/952129791a72ba34ccfdc70030c9ce06/67808011386.pdf
    • http://drivingschool-brno.eu/files/46299856767.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/g6c6sjaccreioicbvl8uud51oj/wijavisamiwapozudopi.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161072c65b4855---wuxopokisesutigizira.pdf
    • https://arvikabc.com/images/uploadedimages/file/lisemijobojude.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a6292d04c30---pidusegu.pdf
    • http://iberryhomemade.com/userfiles/files/kesoz.pdf
    • http://simonide.org/userfiles/file/rapodoj.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_off0000e378.bin
5e69588aea357c54bdc6fe1b4e6043f5b2339b2dcb578f488b6e4da39dbaf779
pdf-font-stream PDF embedded font (sfnt) at offset 0xE378 16868 bytes
font_01_sfnt_off00010ea3.bin
6ec684b0442935968a6675b8bd0b2acbe18a3a5a598fef4032644d4a97126073
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA3 10804 bytes
font_02_sfnt_off00012787.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12787 16792 bytes