Malicious PDF — malware analysis report

Static analysis result for SHA-256 005917a9c0bb7a6e…

MALICIOUS

PDF

79.0 KB Created: 2021-09-02 17:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1423037016ba4d186d2aaebbb0c8345a SHA-1: 597ec13191d578c5471544c21109dfc59862a142 SHA-256: 005917a9c0bb7a6ea1df657758e961c3c49c4404eb2082e0c8572498f48fffc2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b28d84c0e8a---punejepavenutusurubur.pdf In PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d417e4541---pimesuvujiguv.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f53f4a4f7c4---75272624790.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/9396053759.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e79a9e8f9ff---faneg.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/pebakewa.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609974bf2a241---fevegovukopo.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/ruwabopa.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/aa84d972f156bebc88fc8af105010e81/88251328882.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/mpc43v83m9lbiu20dtnra73kq8/2135536911.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/1ea55350309e04eb6fc215804c19853b/39161202352.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/korireb.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/35304767250.pdfIn PDF document text
    • http://adice-area.com/pictures/files/gubujonatotiz.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/tuxonofijotadego.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/82ua2kg3siei2pkpr3p1eao2g8/82845920892.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/zujojepo.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129fc8324235---zevusaragazutimesibaritex.pdfIn PDF document text
    • http://klenderbio.com/upload/files/97596613859.pdfIn PDF document text
    • https://brod-plovdiv.com/images/26938928228.pdfIn PDF document text
    • http://nnrhc.com/clients/9/98/980d61ede38c9a35fe3396fb65651545/File/59994643228.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/7m4mt1asm7bvf1adhta3i64e8k/vatedagipo.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/ribetaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=susan+bennett+theatre+audiences+pdfPDF 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_off0000ce55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE55 17768 bytes
SHA-256: 33e29adca65912ecc4ecee1ee912830ee773010c3e81e6b974ac3d71b72b97d0
font_01_sfnt_off0000fd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0C 10864 bytes
SHA-256: 82370fdb77b7e8be0b2e6e89312632b2a53969c61f6be8bae2eff4942a513d06
font_02_sfnt_off000115da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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