Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3b706863274a03…

MALICIOUS

PDF

85.0 KB Created: 2021-09-18 02:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f322f688ca9f766c08c30425fac68a21 SHA-1: 998af5a3fe35d25c9e4c05631df25812b374199f SHA-256: dc3b706863274a03ae00b519f20eb00a1f61134d6c10cc7839525a917d577eed
156 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of multiple suspicious URLs suggests a redirection mechanism to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161321be753a33---gufotesibotakesuvevovape.pdf In PDF document text
    • https://mar3ol.com/Files/files/jemuxaraxuwapinubug.pdfIn PDF document text
    • http://edallyshop.com/upload/files/guwalolusula.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c17ea514819a83eb036428b303a0b442/dogofopazuxuketeg.pdfIn PDF document text
    • https://themalc.org/files/file/49375046149.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/ladivoxakadodoxisuve.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/lowefuv.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fca429d371a665f0d9888c21225e18d9/zemiz.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/wizizevexigazowo.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c447a5eafc---podukogugerokelatu.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/473fb07977d6060b2bc08b0b0a762511/28269845565.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/55668932248.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/xuluvugilu.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/jenibinagezewusexobipa.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef41f73a51---pepesivunazeg.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/tobanifuzafokizazinufegu.pdfIn PDF document text
    • https://hoalavender.net/upload/files/15850803544.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/fupalorulajizuwaguvime.pdfIn PDF document text
    • http://yilip.net/userData/board/file/ponavujozekujijolupit.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/79656515369.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/sozogifisegofi.pdfIn PDF document text
    • https://panoramabyty.cz/content/69668792753.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/93603256170.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/tipebuwoletowalufajanuke.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/penusamexofifuli.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/19552370465.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16135d31ab4134---pagelizanasopowovadas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=cara+keluar+dari+email+di+hp+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_off0000e72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 17940 bytes
SHA-256: 6d79b683c93a7e66f581e5e106c6467200d26eae981c31dd1a4c51fa3f3a26ef
font_02_sfnt_off00012dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD7 10616 bytes
SHA-256: 1a23304b7a816c84a12740e1aa6cf45264ba72283978c2953d12681e274efe9a

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