Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfd2eb15d8cb97d…

MALICIOUS

PDF

71.3 KB Created: 2021-09-23 13:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0bd02b3881b79d10e9775339ec51792c SHA-1: f4b1308adfbfb0dcf371a20a38f08c079d26233f SHA-256: ccfd2eb15d8cb97dd243392482c09e780a2626f4463d22b2dd46700f0772996d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious files. The presence of external URIs and link farms indicates a likely phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://rafaelstore.ru/upload/files/42799030214.pdf In PDF document text
    • https://sabunwangi.com/contents/files/jufibenememamuniwise.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/denumakujizivevakukerubo.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d8c60acd2418d759bcb84eff7fd75a91/tarebilunupogedunef.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/74709649367.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/74541469043.pdfIn PDF document text
    • http://dentherapia.hu/files/file/xiwelatavepemajom.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/68845221195.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/92109931276.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210922234723_1366102844.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/fovuvosuze.pdfIn PDF document text
    • http://svarovani-tig.cz/userfiles/file/50691885948.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148ed6227bd9---62853606265.pdfIn PDF document text
    • http://jyczgj.com/UploadFiles/file///2021091514200753.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/23872251861.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/39271546148.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/sokozubosomavutazagokikog.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/dulijowo.pdfIn PDF document text
    • http://pjteam.hu/uploads/dobenutibekum.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/revikugowaso.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141de575bdf8---97196205508.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/96161738385.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/q9fpcmgip8alk6c2pssj7plssc/bonugenawadimekemonutipax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=days+gone+full+game+download+for+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_off0000b5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE14 10900 bytes
SHA-256: 2253546f70a27137fc844de9b2a2f4f70887b0cc5f9598f9e4dcd63e077f8898
font_02_sfnt_off0000e720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 15868 bytes
SHA-256: 3459ad758733f11fd7190f63a192c5da7a60a9a4710cab8ae3c953b83f4179b4