Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0224a5e0f1ea429…

MALICIOUS

PDF

172.2 KB Created: 2021-09-07 04:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 091535cac8c4ce4ae03b216af0d71e9e SHA-1: 2e3675c2e2c1949db9f0fadfef1dab36d97ae224 SHA-256: f0224a5e0f1ea42954a06e80ad8bacc89a5573f6881f10046729b288a6782585
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Several heuristics indicate the PDF is part of a link farm, with many URLs pointing to potentially compromised WordPress sites or IP addresses, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://multifamilyfoundation.org/clients/3/38/38c33163524538bb895552046de0b362/File/bilamutefamamemamu.pdf In PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/wuxekajuxadowobubimu.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/sidiwojibe.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611ab88b9dff7---90020695818.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612b04e337a86---75368345248.pdfPDF link annotation
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7fd44311c---53519931705.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/65270299298.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/11877863346110ac3b77a32.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/30484469778.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/51823747746.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/50555348204.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/288bb19fb377dfc3fd7b996d71e9b047/ziwuxiketesurebunuf.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/vofavowabibel.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/giwiveloruwax.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec7526ce18---pamesenim.pdfIn PDF document text
    • https://altbuket.ru/files/46316851457.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c10449c45---67264054194.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/3983947069.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/20967646197.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/vagevapafegora.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/d074c5fb1c1d50533af1dd85306558cd/wonunajetufej.pdfIn PDF document text
    • http://ontsgoi.shop/uploads/files/lurix.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/wizutodurude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=cinnamon+girl+tab+pdfPDF link annotation
    • 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_off000245c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x245C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00025dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25DD8 19964 bytes
SHA-256: 932f6f5bc77e466858bba70a082932fb9dadda6729ad5b9432a302a8d45c3820
font_02_sfnt_off0002915f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2915F 10712 bytes
SHA-256: 882a4138fa1b48a236335f8e1735d7cd4c2746664c4f7bc81c87880e260312f0

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