Malicious PDF — malware analysis report

Static analysis result for SHA-256 62af90e47fab8ae2…

MALICIOUS

PDF

101.8 KB Created: 2021-07-06 20:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d4b102ae280ffa438add4e33dbda593b SHA-1: 8161255d5d4a41856bf5bf79d6b0b86f6fb2f1e1 SHA-256: 62af90e47fab8ae2f2b942bbfe1e0a92b46484077e0b5c78d0a92196d00f3f27
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms and disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and URL patterns are consistent with a link farm used to obscure the true destination of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://seattleteriyaki3.com/uploads/files/farafixusowebutupo.pdf In PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/90880724368.pdfIn PDF document text
    • https://campermagazine.tv/public/file/jalola.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ab18c1288---mojajuwoziw.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d070f4b81bc---88561262919.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/kunigak.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7aed5dae98---98668300399.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/nejirikamaw.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/18100745368.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/xopuzelasotelofofuja.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/6963525cf33936f3e02d480a5ddacc88/dowataxenavixelatozemosa.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df0bc34858f---vafukuxetibakug.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/34301052956.pdfIn PDF document text
    • https://csn-alliance.com/data/files/93888265025.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/belobexa.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/4030361488.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/76519889832.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210605_052634.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/49e832dcc180f1563a93c9d41359225a/4499599404.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/535fea57f45c5c1d1dd560e498d25047/duxivozanomam.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/ecf70535544edd8cc750aa0904178349/43608284048.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abbb3d7f91---ruritepiporiraba.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/ragivivit.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc42a51e62b---62033943279.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d53301a2ed---69375296295.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/fuzavutinonusizug.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1c26b20b0198768e140c5b4bdd97f8ef/64844403056.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=th+10+best+basePDF link annotation
    • 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_off00012d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14547 17684 bytes
SHA-256: 4cd56fd2c90b0b62fdc803a157ea6b6e2591246fa3c0f4dafae8d0f88a4a6af5
font_02_sfnt_off000173a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173A6 10020 bytes
SHA-256: 8f768dfd5cfd0ac502960d4d09818fb9f9b634adb413240122f2a5af43350366

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