Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccdf2100a1da1d0…

MALICIOUS

PDF

78.1 KB Created: 2021-09-01 13:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11a5f82e6a6bd0e087184149642d16fe SHA-1: 473fdd154024deaf78c9bcf5c1c46b3d87ea6584 SHA-256: 7ccdf2100a1da1d0661abff9361aa0086902452d81bfc43cbbb9e12673e1206d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The structure suggests a link farm designed to obscure the true destination or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16099b3c9ae949---1998936256.pdf
    • https://clubon.top/uploads/files/nasad.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b0f380b3---99649971853.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/85ee6ae7e6455a6533059c3515bd1631/pafezanurotamade.pdf
    • https://laatjehuisweerstralen.nl/upload/file/58893797531.pdf
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/95515082242.pdf
    • http://gamjagolla.com/uploads/files/71596596177.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/449d4c60c446afe46914e829cc143135/69393924519.pdf
    • http://pogotowienaukowe.com/Upload/file/wivurupakeposam.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/88b35be7615bfb8cc9bcdcf4fd69ee12/teted.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60ecaf16cd---kixosufe.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/00f32e6b4f2ff6bfba157cfbacdf3f3c/karekopoki.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/639ef4d244760908854a9a67ac2622b4/dijebatovokoderowudir.pdf
    • https://podimercrm.com/img/files/tikubufubi.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/a3f0ff2b20afc9b44ce98aad5ad7a57e/digopoduwozejuvi.pdf
    • http://speaklifeiamgreatness.com/files/files/90553577223.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/ffd1a91d2896b3e1309cc2aaf5b4f1bc/62088328192.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff148758e6---mokerogar.pdf
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/72694512256.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cac0f49f214---54286050802.pdf
    • http://filtrydokoparek.pl/img/all/91875442018.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/gabajunujekewopibavin.pdf
    • http://jandebruijn.com/uploadimages/files/nobidisanotonivezej.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/kopoxek.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=what+does+the+end+justifies+the+means
    • 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_off0000cd9c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9C 16792 bytes
font_01_sfnt_off0000e5ae.bin
c89c656ee339a4e2a87bce0bc9b4859a2827b45ac4e1788f1234f3c176d28b0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 17000 bytes
font_02_sfnt_off00011165.bin
5f4812718f660faadad0bdcfc2ed28997022910ad365b1900bac85f59513730d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11165 10696 bytes