Malicious PDF — malware analysis report

Static analysis result for SHA-256 922c3c8f8164a00d…

MALICIOUS

PDF

82.5 KB Created: 2021-09-04 11:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 037f20ede6ac72fa3df3546f9ec81191 SHA-1: 4db6c9780171586b7dfe74f45400c325cf93cb23 SHA-256: 922c3c8f8164a00d0651ca8813a2d609d0d68da34a315aea071002058a1c40d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=administrasi+peradilan+agama+pdf PDF link annotation
    • https://growyourmoney.in/userfiles/files/99156263169.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/nexitukavitexasaduko.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/lipagokenurunanaxuguno.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/24463d090003356cb96e959a8a605523/1186501972.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/hg4lbn7u3r2svj588ktsbkb9l6/neposabilowasevi.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/17007542904.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/57072gv88skc35n5gfl5hesf7d/zuwed.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/38160239743.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/85251835996.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5975bd4ff7b4fa9a7c0f3462caa29392/nelosutobedenuxalus.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3668d3516---20631826581.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/fugisopidowulazi.pdfIn PDF document text
    • http://synphabase.ch/upload/file/bamezeduferon.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/lefagu.pdfIn PDF document text
    • https://mauspro.net/upload/files/22364796582.pdfIn PDF document text
    • https://gogreenonline.net/userfiles/image/fckeditor/file/kamatewuta.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b407e87688e---21462163628.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085fc70f257a---genemivo.pdfIn PDF document text
    • https://pierreseche.fr/userfiles/file/vebevapatem.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2f667d1a7---57644969254.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/wolexividawa.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/rmatdvauhqphg01570j15sdcj3/molawomo.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/17353791715.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/12942541853.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/72857994752.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b06a991bd9---19461081384.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 10704 bytes
SHA-256: 65dc09c45972ee4b9d6b4fd3a08e0807c669adf49859dd621571734d64cff01f
font_01_sfnt_off0000f525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF525 18136 bytes
SHA-256: 0b6eb4233efb520ab1e7854ba5438ad4b86329844be8ad13835ec13c4b996178
font_02_sfnt_off000123cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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