Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa68f92dd3fefee…

MALICIOUS

PDF

80.0 KB Created: 2021-09-18 12:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7a6b9c3b87fc53d9a0465f307a95ad2e SHA-1: 0c8e5f629304478b5d2ab250891407e263bcb296 SHA-256: 9fa68f92dd3fefee75804c19d4cc9d68e4692542e255fbddef7df4c553ed465e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs that point to various websites, including those hosted on compromised WordPress installations, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://wastran.ru/uplcv?utm_term=how+to+install+apps+on+android+tablet PDF link annotation
    • http://toflight.mobi/attachment/ckeditor/files/eb038ba433970bb9e1d0d3469c338be4.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/bgrds75utgovrm9jmk3h61q5f4/13976357567.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/vvfre20n778qpsroocuf58bl04/dotuxusa.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/33146457306.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/3917318869.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/93398105217.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/gegug.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/f9e280e388cab875b93ca454a0d7d020/nunen.pdfIn PDF document text
    • http://orem.mn/uploads/files/fefiwoluzupibibitiped.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/telepijewipig.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/6cc5da467e99f8dbd7701137750d93d1/27029081616.pdfIn PDF document text
    • https://carpenterstouchnj.supremeroi.com/FCKeditor/file/66244448215.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/50767528156.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/ronobefumune.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/40065182889.pdfIn PDF document text
    • https://pustelnik-budownictwo.pl/ckfinder/userfiles/files/27754824559.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/38714481929.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/98662616821.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/zawomegajitubepegazarol.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/kabaxaduzovodukawim.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/4212769712.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/86196348052.pdfIn PDF document text
    • https://jmclimatizacionhvac.cl/images/subidas/file/85245506395.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/wuvuzuxafefed.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/rokufarilo.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c871d3bbfa---pavutivukodaje.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_off0000d5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FE 16932 bytes
SHA-256: dc269c76581aae7d1250c9e02f1a69065a2f3ea99eed48bdaf69616dda1fbbe4
font_01_sfnt_off000101a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BF 10604 bytes
SHA-256: a3cdba23622012143ab121907da0107827d29781ff441b2604305e6bdbf69c04

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