Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bdb61a82865849…

MALICIOUS

PDF

234.4 KB Created: 2022-01-25 00:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: e8fa7bf88c6d3e193214138041fc8377 SHA-1: 77f7782130d3a41470429400de1d1deb45050875 SHA-256: 72bdb61a828658494e767182d827ca15a54e0374abf9b59a5182c3193e41d6e1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high-risk heuristic for an SEO redirector link, indicating an attempt to lure the user to a malicious site. The ML classifier and ClamAV detection further support its malicious nature. The embedded JavaScript likely facilitates the redirection or payload delivery, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7758

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 lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://yuha.be/_files/file/62464545165.pdf In PDF document text
    • https://1tlstar.com/storage/uploads/files/muxajaxivefovatu.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/25430525496.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/libotupelaxolowalifama.pdfIn PDF document text
    • http://msiutilities.biz/documents/kenixoduxazidawipida.pdfIn PDF document text
    • http://www.alite.com.br/assets/kcfinder/upload/files/57540911626.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/6385133595.pdfIn PDF document text
    • https://gogreenonline.net/userfiles/image/fckeditor/file/xopip.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/65271688109.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/10447479302.pdfIn PDF document text
    • https://huk-machine.com/userfiles/file/bijefo.pdfIn PDF document text
    • http://findusafranchise.com/files/files/20850735758.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/45862758450.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/gubes.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/96990890423.pdfIn PDF document text
    • https://aurastaffing.es/upload/file/tokemewoponodedonugudo.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/korawuwexavajata.pdfIn PDF document text
    • https://krossi.ru/images/content/files/pibegutogoteguniv.pdfIn PDF document text
    • http://www.rajpuc.pl/pics/file/22236490189.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/jerem.pdfIn PDF document text
    • http://marketingnews.fr/images/file/solikewabudada.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/fujazabaruruliwomen.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/50619049594.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/6428071177.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/896FEnmJZlk/uplcv?utm_term=being+together+appPDF 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_off00033efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33EFC 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0003559b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3559B 17812 bytes
SHA-256: 38b75fab49897d53bcba87d90a8abca4b947aec53cfdc2e6aba78af922182ca8
font_02_sfnt_off0003836f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3836F 10368 bytes
SHA-256: bc18d3384d32e53de9dffaa9be8cc759618a2ba57c21558f148eb7f85d50479f