Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be4c02599a1918a…

MALICIOUS

PDF

80.2 KB Created: 2021-09-11 09:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dc1c56c8a7b96bbe355988fa16ad0a34 SHA-1: c55028804db3f1f6dbccff9a526c8b43970fd293 SHA-256: 1be4c02599a1918a8f00be18dec5e65b5798193ae3d5e16c1e7dd73158242532
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious content. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://sintjorisparochie.nl/userfiles/file/dexiw.pdf In PDF document text
    • http://hrt-foto.hu/_user/file/jetefefufiwip.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/88421346435.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390081979d3---jisifodene.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/40542964456.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4a975c451---vuwaboga.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/pabosojibemitugeguz.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210902_135148.pdfIn PDF document text
    • https://emmaushuis.org/pages/wigujebiruluzitu.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fa2115938---renupodemidigow.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/jugivudixerizavuxanifujob.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210902_3514CF2E910BD9D5.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/91337589953.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c38c74a552---25106332191.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/56942492343.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/65006897304.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/vogasixenudujivi.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/58045649183.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3cf9e9d15---1233052087.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/xexoxilukar.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/58547260942.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/15510832083.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/rewavadusojesej.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/78327962813.pdfIn PDF document text
    • http://dominant.name/userfiles/file/pemejebuzozabajodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pepsi+man+game+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_off0000d78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 10696 bytes
SHA-256: d857838e3a413ca5445a603d0514d40ad85349f2a92fbadada447cbfd22f82fe
font_02_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 16852 bytes
SHA-256: 19548a70b4ea6e7f6d8669c887759769faf18503683dc1819c9d2f75d4ff979c

Open this report in the interactive analyzer, or submit your own file for analysis.