Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5ee8db357c2569…

MALICIOUS

PDF

73.9 KB Created: 2021-07-01 00:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ca5a403d4d1e5f8853e6c488998ae3c5 SHA-1: 60b5c328294ff676a7a2ed7560ea3b19d592b592 SHA-256: 1d5ee8db357c2569f803b30775be391cd853b54daa35348fc196c57feba19648
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, a common tactic for distributing malware or conducting phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF structure itself is designed to host these external links, likely as a lure to entice users to click through to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/a3bc9b3a5d84264bac86c0ad11b5a205/sizenurevipu.pdf In PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2ab92285cfa6acb58352ce4638bd0998/67363753675.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/n697kk4o7jbjepu29ihdsr9hp9/52296872812.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/4c6f8cd6306d0b2bb948edb15fbe58d7/jimaluvegasupamipimazev.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/b58619dfef3d13e7cf558205edca7837/65263405876.pdfIn PDF document text
    • http://nmglyxx.com/userfiles/file/miwafakobuxete.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/v8b07knli16fn5asfqlskj3mq7/narilekan.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/naruvojebepepuz.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b084f1db3---57527657887.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092786b39cb7---rebubudigufapinanusev.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/52pipfs3j6fgp4l3f0caso31o0/42047764694.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/81337830958.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/zafonajoruzitisaw.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5cf5c0bad---dubimum.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/marupezapiwix.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/b7ab002e2f7b5cec218647b20e598523/bevabuwu.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/subagaridopibawutojibad.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d405ac2642---mumezewif.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e025b804d---wenowugijosa.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2537c59e7c---lejakipox.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/2f70bc4990efa2ef11a143b75446e98f/66918225063.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/vajukobezexur.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/wobimebosagubokulorapoze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=animalfriendsofthevalleys+my+accountPDF 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_off0000c040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC040 11004 bytes
SHA-256: fc309b0aba83926ee946d7429f9dbc1c73a845887fbca2baf2be93f8b74b411c
font_01_sfnt_off0000d9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A5 15908 bytes
SHA-256: 8ee807522620163eca9aacb161b09309c8cf630110042fc60b9b0c296bfbbad3
font_02_sfnt_off0001023a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.