Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa93b083ca633c3…

MALICIOUS

PDF

83.1 KB Created: 2021-09-13 06:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d0c126a6a8dd93b1d4f6e5740588ce4f SHA-1: 40ceff14aa005175a05dd48d037d293077e0ec45 SHA-256: faa93b083ca633c3d569efec9c00e04ec31bd9f2a2d93e5fce21a08928c52c5f
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or are part of a link farm designed to redirect users. The primary attack pattern appears to be directing users to potentially malicious or phishing websites, leveraging a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pistant.ru/uplcv?utm_term=4k+live+wallpaper+for+mac PDF link annotation
    • https://www.agencesramos.com/ckfinder/userfiles/files/vogomotenag.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/feeed9f36d8cfff5ad7220d2423793fe/99042912388.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/tovuzavepuwuxaxo.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210902_4CA182B564AA824E.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/43169150564.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/rafodikuzimosor.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/57175321752.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/66317994304.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/bizepovarafadirezuza.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/84927625594.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/rokefixufe.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/9167136647.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138b1532a6a0---20828968789.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9099088e3---pugivadoliwizub.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/joxazulewetazuwoxoreti.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/repodejewibepeli.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/makevozapebelumaxitewu.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/5490185571.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/46286718342.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/7742065278.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/59933605394.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/24973772880.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/45bp02kv8e8alap750um361965/7822153675.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/47434380103.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_off0000ddf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF1 18504 bytes
SHA-256: 0ecbd9e68bd767c548da15c92ad8e43ddc1f54d6795200f12adc1cf8ec37b319
font_01_sfnt_off00010e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12699 10496 bytes
SHA-256: 6d5e431dd1bb96dd35ee6d165afb74c63c4e7cba449a8ef93e838a3f4fbc05f8