Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae2b321f3d268d1…

MALICIOUS

PDF

88.2 KB Created: 2021-07-18 23:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e371783044e0232b9132093411e3608b SHA-1: cc7491464b1111261440625bbe7014dd0f2c596c SHA-256: fae2b321f3d268d1f80f82d4afaaa3eaa9f1391c84bad956e684930afa764f90
156 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/khcemtoqvsn8843nfc6erfhd6s/tajujuxe.pdf In PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9ea2a3d6c---55594486446.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/70771342061.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/62187546752.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/218d416c5c13fa3ad1c2a6be4da94bf2/pulanubarirezup.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/2as1r5djk2esgm9tovlffrvc32/joziregar.pdfIn PDF document text
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/galafemap.pdfIn PDF document text
    • http://erex.hu/upload/file/migujuweresib.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/94709615690.pdfIn PDF document text
    • https://premium-house.uz/images/file/50274328561.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078624081700---limajujizidakuzaguke.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd56556c3a---jiwoxugadusom.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/17217814259.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a0bab5b8---8062366368.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76f0bc7539---86612378538.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/28a478426b1b3e582a60ca3da4d0a041/monabeke.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/6086024609.pdfIn PDF document text
    • https://kopari.hu/files/file/dunasufozeraw.pdfIn PDF document text
    • http://better-pharma.com/images/file/files/22899155707.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/b522e866daf59e9705aa6762a356557d/dudebaropogurulolon.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/19271053933.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/f3b72b70ee83510e25ac3dacedce92e0/66238304630.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/77262256033.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/c11626d8a69ed5aa1036db5a8be050fd/kodab.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898d8b73a04---sosubaruvubed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=fnaf+help+wanted+free+download+androidPDF 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_off0000f883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001109a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109A 10492 bytes
SHA-256: 55f39c67c05297f994ea154098a21224dce472623dd6beb84982af0a61b60e75
font_02_sfnt_off0001285d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285D 16520 bytes
SHA-256: 14bed39330141e76c170d23f0397050b6d8147cfe786045459fbe5e6be24f6db