Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b059ee0dc9f110c…

MALICIOUS

PDF

72.7 KB Created: 2021-09-02 09:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4d911c87cd061beca5145df1c81d69de SHA-1: 1c30a563efe9c779118c36b3178660b8cfa94895 SHA-256: 2b059ee0dc9f110c922b96c17439e142b074093ceb8d89ff4ff267b46a69aec3
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'utm_term=download film percy jackson 2' parameter in one URL indicates a lure to trick users into clicking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/c228950bf23cc83bcf16b983630fbfd1/wusojig.pdf In PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/pakilit.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940619a22ed---42597874082.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kujer.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/pitilaxelutudaxoxodepo.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/467b0idjaovv6lgsugo9r134k1/xefigiwibexulapagijetu.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082561a87b04---75493307579.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/66314730500.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/81074119097.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/81608198064.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/18387839702.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/458323c5ff332eea25911d78da72dd46/modaserab.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/f0rr26iaovgrp96rqc5kvjmms6/tijujefogozamudixomo.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/40386592261.pdfIn PDF document text
    • http://gibisch.biz/files/files/lejaxanuxekisosazar.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/14c69e7b83b1ca31f4e50531a1d5bfd1/94502158996.pdfIn PDF document text
    • http://igescanada.com/ckfinder/userfiles/files/82490585443.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/xivefedirinusosaleju.pdfIn PDF document text
    • http://df-2.de/images/daten/file/junod.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/titevupagakofawudiz.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/a6npit3tb3rknmk7l730cvf844/jononitu.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/72887967990.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/xekutinijebutuwemud.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/577bnhgn13483mner5nvb0vp60/juzasopet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=download+film+percy+jackson+2PDF 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_off0000bb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD361 11224 bytes
SHA-256: ae5ab56ec2cf5fa354dfa74913b4c2715c4ffb2ffd7a48ffe4dbae90dd9f2f5b
font_02_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 15040 bytes
SHA-256: 4d5d96f455025b026520c2276e964929268c3c85300da8d34a35d1beaa134618