Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f00a8859b0e7749…

MALICIOUS

PDF

81.3 KB Created: 2021-09-21 09:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 95adc6c9a2574a4e12f4a1dea92f3605 SHA-1: d7eea9c722100e34d3be9eb3f29cee94296dea47 SHA-256: 2f00a8859b0e7749f8993bcf442e4dba8f975217f206aab2f3cb5a11321e34c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. These links likely serve to redirect users to malicious content or phishing pages, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=what+is+difference+between+android+phone+and+iphone PDF link annotation
    • http://goldnumber.info/userfiles/file/beluridebib.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/sutodo.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb453dade8---vipeloxukituvexobebudar.pdfIn PDF document text
    • https://km2804.com/ckupload/files/14641079998.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/72872088073.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/065974b46f11c39822dbac0074347987/35670228363.pdfIn PDF document text
    • http://szcftz.com/upload/41463182419.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/61497414446.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3e02d91e3---mixadaro.pdfIn PDF document text
    • http://topbondtape.com/uploadss/file/jawenomomi.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/52732528120.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/mifowulurivujogutop.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/vapamufufoleluparubepem.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/29479054995.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/zopamifumujojajenivet.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/zututetelitikapaw.pdfIn PDF document text
    • https://unaizahic.com/Files/files/53358993950.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/9ibcv1knic2rks3e75p129icl2/13821468391.pdfIn PDF document text
    • https://dawnraytech.985.tw/data/file/userfiles/files/55412537938.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/xuzetoxe.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/jopigavudoreroketidew.pdfIn PDF document text
    • http://futboltotal.net/images/files/36163993007.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/27965367143.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_off0000d7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 17632 bytes
SHA-256: dd240e2c2497f46b2d7c8be5665df54e109e87f37d9a462186b82229c23b9469
font_02_sfnt_off00011e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E04 10892 bytes
SHA-256: d17737a4316dc3f0e1033f544799c0e73edd3ace422f33276cf2246460685fbb