Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92b98265848bb1e…

MALICIOUS

PDF

94.9 KB Created: 2021-09-12 03:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 17722903548a7bfcb5c68b6e106bce1e SHA-1: d2d6c670b5f70ea6a17db494fcce68157313106f SHA-256: a92b98265848bb1ec39ef8a716e7d26d5f12dc0029ab07b1d5830bf0fb577b6e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://master-br.ru/img/file/65399150677.pdf In PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/66854056965.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613992e24c814---mezoxiteraxawapijoloniw.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/38626306661.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/mepowebibogexuzuzimad.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/xaburotuwuka.pdfIn PDF document text
    • http://parfumland.sk/upl/73481561627.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/bijabizetezaka.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/69707761338.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/99585088108.pdfIn PDF document text
    • http://packamate.com/userfiles/78057362712.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/3886792394.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/fewil.pdfIn PDF document text
    • http://yuha.be/_files/file/56231383479.pdfIn PDF document text
    • http://claudiamelchior.it/images/file/30542619127.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/nigivetebagunipufuguwa.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210910095454_xb7g59.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1630780010.pdfIn PDF document text
    • http://sgrdinstitutionspandher.org/sgrd/userfiles/file/68302677294.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613964e7b3a8b---fudanerowene.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/negukazugulapukixamo.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/wudotinafusevidirasuzaxaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=demon+slayer+mugen+train+english+sub+freePDF 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_off000109bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BC 19140 bytes
SHA-256: 6a4cb4148c2049e9296f21f9b521a7773ec2719427799861994fe338525e183d
font_01_sfnt_off00013c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001542d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1542D 11016 bytes
SHA-256: 15f530ba652e930555b01b35dd9c716c7b13bd993a3c05fa017ef7c0a45b72cd

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