Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6632fad066f6b92…

MALICIOUS

PDF

80.2 KB Created: 2021-09-03 20:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f14458344143cb5b6509912403c11057 SHA-1: e114f325eee5fdee5e4ddc1803ac3881a853e483 SHA-256: e6632fad066f6b929c6ef8cecb9c6eedf8361c622be76816ef150296fb40f0d9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. These elements strongly suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crewmak.ru/uplcv?utm_term=avent+breast+pump+electric+vs+manual PDF link annotation
    • http://cs-web-design.de/ablage/userfiles/files/mewagikanepurofi.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e87801732f---18603592803.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607249008042f---lirosudu.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/85888218690.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4240eeea---wadobopewexafivinorij.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/54ca14164513ac6a619a796be77a04a2/79426645148.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/savimedewaxeweburowufelez.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb4edd1609---42540721911.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/wosef.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/molokadirefirovolozomorip.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/235f1997cd83b0e3afb6940a5f3d8a1b/lajasakurumolilezimifov.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/a7us32d8hre7lev8o9e8qg5di2/52245657049.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/wekarikotinawuga.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/2141965007.pdfIn PDF document text
    • https://agatanorek.com/files/file/73132272856.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/69704820784.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/buxopo.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/f6068707f0085e3d00d9ad467ca3608d/65074887479.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/38388690394.pdfIn PDF document text
    • http://roocenter.ru/upload/file/12793437059.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123c0b06e598---kilumodifevasojifajejug.pdfIn PDF document text
    • https://kajariaadsevents.com/admin/uploads/file/dixoxixaxobuzazowigoru.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D1 10700 bytes
SHA-256: 5b3532380045e92f8f36b7a3424bb754a4116e46cb217ed72a4f98143ad6b706
font_01_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 16856 bytes
SHA-256: 5ef87c007eb0725a5d4b72dea8831e2d22bb3702d5d5772ec0c7035fb01bcf4e
font_02_sfnt_off00011aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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