Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e3df827e38af5d…

MALICIOUS

PDF

68.7 KB Created: 2021-09-05 00:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d5d158025629fb2c0c13c09f865b87e9 SHA-1: 0861315311069fec64254fa84b69bc1a714be10f SHA-256: 26e3df827e38af5d62dd68ca68addc7e993cbb8d7861b159612f11748a58d9b8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including an image-only presentation and numerous links to external sites, some of which are hosted on compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm suggest it is designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://irinaburmistrova.ru/files/53806111387.pdf In PDF document text
    • https://mayxaydunghoangphuc.com/userfiles/files/60560637023.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcbe78c672---pevobulerozomimuxam.pdfIn PDF document text
    • http://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/11878426954.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f32df240643---12112695397.pdfIn PDF document text
    • http://fxmeat.com/upload/file/38bf332fd536b8002f8502769ae74e72.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/b971f7c98611cce67464b56059569b84/zepitalutimejigadepejin.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/mopowupavivelepijasikokur.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/82102492913.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf75ba77c17---kajowebadifaxazog.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/24019582764.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa26239005---buwegudafijopunumas.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/mopuvem.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af87f267779---rinosopoforutose.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ebbcc29ba84cd23cdfa2227ff4cde980/dovonedesefubatajeg.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/36335766663.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/mowuxulowoniputikexogo.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/nkrimeromd9kljhoim1k74frfv/telanelux.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/bf0a4cf149dbe1eaeec77be0831bb035/80448367671.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1624989247.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/9240d7004b746d456f6be6d2e17ce632/75522468572.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/52c093b53ad03450474849c68c28af1a/60880715567.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/miribomanaririfaberakade.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/n3nk9eguh6ch1n5hmp6pijt18p/zutexetugudavolugubiw.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/sqctg6jdo6k83mmrd3h06cs7o2/xewenubapuzope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=this+love+planetshakers+chords+pdfPDF 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_off0000b3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB9 13228 bytes
SHA-256: 619c9c59396fb90cbb94f13679fa32284773cd4bab43efcf3ef32538f7b41471
font_02_sfnt_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 10836 bytes
SHA-256: bfa68b4cae8341018d3b166ad4b1336b7e1976bc83ded8b17977c8c7b31cc8b1

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