Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afc06a9ee062f79…

MALICIOUS

PDF

204.7 KB Created: 2021-07-06 05:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 539a47241df49ac211d5baa4e4b252bc SHA-1: de7186bafb020456b45bd1bf689bef8a940d4667 SHA-256: 5afc06a9ee062f798d2be6ae72f7ee09a39734a949e45f142f3fde6ce7d47107
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to compromised WordPress upload storage, identified as a phishing lure for free downloads. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7752

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 http://spreewaldatelier.de/img/editor/file/46645277847.pdf In PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a51700b262e---guxosivazepebebetebolor.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf577a2110a---70519285574.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/vokukote.pdfIn PDF document text
    • http://zjpjxt.cn/upload/uploadfile/file/sevuzinigomaxeno.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5920e361cb---2895232362.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/vunos.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/zeruzajaxafiwubifa.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/80860352720.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094e9ade91b8---81412023733.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/83446697463.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/roloduwedomemisezologe.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/29687845659.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160851649bff40---nilexinefute.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/c8ektf8dderuktjmsb20u8hebv/35733508563.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c753b97d0---16690266529.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/28fe28b4d3cac32ae32991b7bc738650/95830664251.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/62191509750.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/80216032790.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/rejigobufijazokoxitobit.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/7babe377c1bb6e749b3c26e0193302a5/36769537864.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e65746837---xenisobogakebegikasa.pdfIn PDF document text
    • http://whatdwellswithin.com/file/taparilenozivulira.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=a+look+backPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00026b0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x26B0D 38880 bytes
SHA-256: 477fce6b55706135ce43cb0b0f3998d798d15feeb7ad43998bffa30cf120209a
font_00_sfnt_off0001ffb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FFB2 9740 bytes
SHA-256: b20c7119e2ade4f7c285050e51e2aca6156f9178ff54bf8441d5097679e3f5e4
font_01_sfnt_off0002151e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2151E 39872 bytes
SHA-256: e218ed18cd6c7321ace6c7489df00612afc4819841b9ea67843f7b9649e035da
font_03_sfnt_off0002b392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B392 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0002cba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBA0 31472 bytes
SHA-256: 6812d4defa5486e57b147f561cfc73ae1313d6ba9232c1b75afe8c69ed2c5627

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