Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3509eb394fe0d14…

MALICIOUS

PDF

353.2 KB Created: 2021-07-30 02:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a4cde3f4dde69956804e2a5da4ab7dc8 SHA-1: 70cbd240f58300f13954e37ea8935aea8101275e SHA-256: d3509eb394fe0d14ffdd5c561e5b5c9a9a6ebb916f1b947def1b3270869bdbe3
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a link farm pointing to compromised WordPress upload storage, utilizing an SEO redirector to disguise the malicious intent. The presence of multiple embedded URLs suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8429

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160867ac8bdd60---53354914314.pdf In PDF document text
    • http://farmina.ru/uploads/files/lizuradekenedoxajejo.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/5670q8taiv3f0pamospa03c395/64944940590.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160ce992643890---sokiwafito.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/sijetemubopijisinasaf.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/81099598531.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0306003071---80011380108.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1621462232.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160713c9c3e6b1---forop.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7bafda026---2538028928.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e67c4f316---lefiraledaje.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/91888535069.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/22746277260.pdfIn PDF document text
    • http://eva.am/files/575f59ed8c581ab0.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b30e9da041---79785379975.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608406624bf69---kosunososenaxonijarezob.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da42063e9a---44913043949.pdfIn PDF document text
    • https://businesslife.com/content/files/rozutepopebapezujopalufuv.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/takiwozaxowonatafalew.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1869a1cfc---rekusudowapaguw.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/solowo.pdfIn PDF document text
    • http://metallpress.ru/files/kukefubudaxoxiwis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=off+road+outlaws+cheat+codesPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00049a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49A00 34960 bytes
SHA-256: 948a62744c62cd102891805aa73aecd650eaee61ffa3f7cc3743c6d077a422ed
font_01_sfnt_off0004f496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F496 10588 bytes
SHA-256: 02db48c619d28bcc2b60d65c57d8584aa6f80d3806290ff69affa2a02af44ea4
font_02_sfnt_off00050d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D03 18096 bytes
SHA-256: d00cff967c7f28696e917e3de6bf8d992fa7da2e6abf025c3ab2d320b9d9a4b1
font_03_sfnt_off000529cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x529CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000541de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x541DE 16200 bytes
SHA-256: 323cc8f406ec2500c002c64f1a27b8e09b77d7ee825e0ec43020cb8cb5bc28f7

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