Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c70c60ca4d69f47…

MALICIOUS

PDF

87.1 KB Created: 2021-06-28 13:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: aa518cfe82af190905758697cd68374f SHA-1: 2a9a69712b818a285a4409605b8be7418c34aa3b SHA-256: 9c70c60ca4d69f47422a853c8ca0f593ccc4d1b3b261f1dd251f10d7d9f21ae9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple distinct hosts and the 'utm_term' parameter in one URL further support the link farm and potential SEO poisoning attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaa1911a4a---96617741524.pdf In PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ks5lld0bkp6fqf7cg7ia2akmp3/nivupebekefoxuv.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/dcs8emiku3ldcr091lmicuja9u/19357511974.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083578824306---93113681983.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/b034e3f3ada80d002582d11f2a10c43d/84319378876.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/bc9301a2dab16210a9340e453186fe35/48263003428.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/b53c4c24a1789ac090ac6ef43adaf378/nixagodijetewubini.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/19749939642.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2c75005d98b169d63511d59bdd554bfb/donafirizivigenegelekapa.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/63l2v3gql6lguqe0n8l7ab4ckb/6322442538.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/gokesunuxiw.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/mokonemuwurazuzox.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/a12qgu1e1hmuqui7j6075nf1vo/92703391951.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/20829369896.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1dbf63c8f---48112475922.pdfIn PDF document text
    • https://mszukam.pl/dat//file/35789560427.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/zufadis.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083efd791b92---98473981988.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9699786ba9---kupago.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/501dae91d81bf7358577d9b9ed61412f/63673604680.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/86693576064.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/fivir.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f982a74fd1---39620705902.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/v0o8klughm7fmvj6vgumranf2o/gixegugij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=photoshop+for+mac+free+download+full+version+2020PDF 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_off0000f080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF080 11380 bytes
SHA-256: 491185385b9d3fd16266eca1597c2a06a4951260f1f8083c0d1d536d275515d3
font_01_sfnt_off00010b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B46 16812 bytes
SHA-256: 8fc265a2c3780a78d6015cc3cb7f3349963e600a12cbc311815b3d1e6da6fe63
font_02_sfnt_off000136eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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