Malicious PDF — malware analysis report

Static analysis result for SHA-256 68801743049e32fe…

MALICIOUS

PDF

70.0 KB Created: 2021-09-24 22:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5131141c1a20e1cde5e15e0aa5aa7346 SHA-1: 378aac6f48b9574275da8378b41c503fe10dd427 SHA-256: 68801743049e32febffd451d3141576ecc143db0ce071184b2f4ee7fadccd0b1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple disposable hosting sites, many of which are compromised WordPress uploads, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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 https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab8e2790b5---24066386708.pdf In PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf5006bcac---xanemivoxa.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/dupulepojaxuxarumukas.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/sogulimoteserutepiwow.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/pakorulofixomu.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/domejakewuretumuv.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/21924082342.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/161463f4bc8c39---57316019949.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/15236292452.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/57877731536.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/rimeropusawowobisiga.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/xarevuxapejujex.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/70904310948.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/gobinefowovi.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/14523542048.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/65281666847.pdfIn PDF document text
    • http://canadianrockies.info/files/file/lufizevuwezor.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b6bbbd2770---47536651477.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/a7hfs0re368d8knpk20rkb2okh/25813625974.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/47044246831.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/82420559844.pdfIn PDF document text
    • http://ladna.pl/user_images/file/54918220047.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/zekep.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/xeporedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=route+planner+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_off0000b290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB290 15728 bytes
SHA-256: e37f0d4a1368a33bf3e767ade1eccf13324216f83daf675e9aa211fa498e222b
font_01_sfnt_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 10364 bytes
SHA-256: 0678476e10afe0f3d5c47d7516191730238f1858be488dae28d33c56355cc6a2

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