Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23debdf67cdd09f…

MALICIOUS

PDF

106.4 KB Created: 2021-07-01 13:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9c9094ceaf51bccfeb7ba906df8dfbd1 SHA-1: 3c7ef56ed5cadb1b98cc739eb414c8965ea12729 SHA-256: d23debdf67cdd09fc901255d08ee88dc65eddeee73cf8840df5a6bf322e41005
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the structure suggests it's designed to lure users into clicking links that lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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
  • 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://institut-arabe.org/ckfinder/userfiles/files/8043283057.pdf In PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/bfa75371aea615c5d4f7f80c40a00291/dapafekezejopofibilaxad.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926a873d3f7---9899439993.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/zupatajovenejofojebajilit.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735ca683be7---xixepexusikujedisipo.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/dijuranejizojujobarive.pdfIn PDF document text
    • http://asustainable.com/global/file/78739894207.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/525264083ab5c7a7adb8fe2491f24651/53455138841.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/ganiw.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/nazawowuwususejudebo.pdfIn PDF document text
    • http://berbun.com/user_img/file/67952325258.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3290529af---6776494865.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/5j03u74tqhlh2q1afv5ljisg71/61129384026.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16076a0f63995c---gagixipejunukalogawod.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/94767087220.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/japidawuseril.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082313e55615---kupobagamul.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/10389026917.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/8155b7lk08jt2mo8nrt2uo2cf8/18745624241.pdfIn PDF document text
    • http://easttbirds88.com/clients/d/d7/d767393c090093bf18db16876c07b5c3/File/68850129185.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160923494222ef---xedukuwidudalopevasozede.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a0a5ea122---2099389707.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/48367242801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=pathophysiology+of+infection+processPDF 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_off00013d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6B 17360 bytes
SHA-256: dfb0ec611799c81e6ca995792a97385d1fc99a980354712382e35216e112a694
font_01_sfnt_off00016b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B12 10876 bytes
SHA-256: 136ac20b1023a4ad7732ae054ea5979a2f190e87dea54bb0db8cdb9861a1d9df
font_02_sfnt_off00018436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18436 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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