Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6fc20de21f81b1d…

MALICIOUS

PDF

69.2 KB Created: 2021-10-03 13:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fb71cdd3f6f7ce78c0bcad70d9e0ff60 SHA-1: de7f6a4dfbb205164d907c3db199529c667be67f SHA-256: e6fc20de21f81b1d67fd265911c7d094868de5394e7505d758ccc867758c7341
176 Risk Score

Malware Insights

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

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. The presence of multiple links pointing to compromised CMS upload directories and disposable hosting further supports this. ClamAV detection and ML classification confirm its malicious nature, likely serving as a dropper or redirector to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 2 text block(s), carries a click-outward action, and is only 69 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 https://egyediajandekotletek.hu/mvc/userfiles/file/97950775243.pdf In PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161480ea3ba5b0---98873898415.pdfIn PDF document text
    • http://recrute.fr/files/files/16073319913.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16158d1228bece---89401119672.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/75282606090.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/karemirubifopa.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/13862646177.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/15795682266.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/92652514777.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/9544332118.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/pesobevawebixogazopaju.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/5df4853ab5050c7cf320b5741f425a78/natonuw.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/xupuxudebepovir.pdfIn PDF document text
    • http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/penugefadewakovomipegifod.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/44434162815.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/37656766206.pdfIn PDF document text
    • https://ms02bet.net/contents/files/74986486024.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/98855432791.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/degalenufixiredozeveki.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/tatoruwiw.pdfIn PDF document text
    • http://k1a.ru/images/files/file/75354087399.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/50066337272.pdfIn PDF document text
    • http://www.heatandgas.com/EditorImages/file/pudutemur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lesson+11.1+solving+linear+systems+by+graphing+answer+keyPDF 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_off0000adc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC9 11272 bytes
SHA-256: 6c9cf4c99ed9632fb1bdcf5165148fe23a81a7ea1a1f22c76358fefae560cc0c
font_01_sfnt_off0000c7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FA 14528 bytes
SHA-256: 52f285749e8b22d826d45bac20336230d0351f5286bc62714a0c394f9bf5e05d
font_02_sfnt_off0000ec84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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