Malicious PDF — malware analysis report

Static analysis result for SHA-256 c268498c216da49f…

MALICIOUS

PDF

75.2 KB Created: 2021-09-06 21:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5cdd25748543258e6829e6835fd0fabb SHA-1: 9113ef55022c8b9400aa0806e91495511c839f55 SHA-256: c268498c216da49f89d26f0a3c1c36cb946d6d541b58b60e1d783f469ec308e8
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ajrl8us4ha45rn9scej66nmnn/lirisowonirakodak.pdf In PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/m3sau4mkc8tvoe1j2v1mrjqrhl/13686825406.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/1299775750.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/kovumejumuse.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160783b0d34570---3907919122.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/sujorufom.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac73ae4ad24---43714713975.pdfIn PDF document text
    • https://datajournonepal.org/files/xiladatemu.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/fuzexuwononenudefad.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/21871850496.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/gixuvegafi.pdfIn PDF document text
    • http://donationwebsites.com/clients/6/68/68901b9e08e997a22fc64c74502b39ca/File/gaborebomexojirig.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sevonimadumef.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160730308edf63---veliralo.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/b8a05bc591a5a859ca0990586d902585/zuxewinujarepode.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084c3b948b0e---19479588886.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/95667631084.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/mizomopa.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mirosutakuzodulozabeva.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b918baa3db4---38413990622.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/vanikoziviw.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/nulofamukapotos.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/73816849840.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/cc4a4a9bce78fdd02cdc038ad546c9d8/tidabakufoxaka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=elitedesk+800+g3+mini+service+manualPDF 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_off0000bdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCB 17900 bytes
SHA-256: b3eb22d72e96ad073fd51556cb58ceef58a76c0e88a86176892583c9a62b06d2
font_01_sfnt_off0000ec68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001047f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047F 11336 bytes
SHA-256: 7b8aac5cc3b8263714b63ca796d292212e478fece97639e545aa27f2f8442298