Malicious PDF — malware analysis report

Static analysis result for SHA-256 445ef54397a86701…

MALICIOUS

PDF

486.4 KB Created: 2022-02-03 04:35:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: fe1f18b72da03ca2fa909adf44407ce2 SHA-1: 855fcfff426d323ae6f7e203e631d79fa1bc3ae2 SHA-256: 445ef54397a8670169f1df0db3718329c1e15ba11d536b5242f8b300bb0d9b73
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious intent, including external URI links and a link farm pointing to compromised WordPress uploads. The primary lure appears to be an SEO redirector, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of multiple malicious URLs and the ClamAV detection strongly indicate a malware delivery function.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5220

Heuristics 6

  • 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.
  • 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.
  • 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://wirut.co.za/XSRYdR1H?utm_term=android+name+meaning PDF link annotation
    • http://alpinedelhi.com/userfiles/files/45152137801.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/35167056756.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/53023710514.pdfIn PDF document text
    • http://julianina.de/upload/file/59812080035.pdfIn PDF document text
    • http://pioneerbuzz.net/userimages/98771397878.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/spmhiqqigap0h15594i3dojvpp/buwiruzadafokulekisa.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/60791891614.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/161ee9fdfac4b9---59800950694.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/22558936993.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/e0f6d144323b2d7109d1bbce9628db68/80903342780.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/36659475914.pdfIn PDF document text
    • http://alarm.pl/userfiles/file/91324561117.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6686f53870---furup.pdfIn PDF document text
    • http://dejonghenico.be/sites/default/files/file/jogagifejiwiguga.pdfIn PDF document text
    • https://pisausakti.com/contents/files/230471111.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156e751da4d4---tobur.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/purosureni.pdfIn PDF document text
    • https://www.rioclaro.com.co/kcfinder/upload/files/17057406671.pdfIn PDF document text
    • http://rogatka.osieczna.eu/userfiles/file/6241337154.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/xulidukutumusivimum.pdfIn PDF document text
    • http://centronegozi.com/public/lukusu.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/18910281769.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424338a852a---mevov.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424d5654e98---lunipefopupewevovexozav.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/lavuroxuti.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000728be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x728BE 10260 bytes
SHA-256: 4645b0210495ddbd4ea9268140ed38b9b2905afb3f5cd8d1ef9c328dd6d186b3
font_01_sfnt_off00073f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F83 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0007569e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7569E 19524 bytes
SHA-256: 8ccea86212f17af38e1327fa82a3420fbe886170102cf85427ce2dd4657cb70a