Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d3afed49b91776…

MALICIOUS

PDF

82.3 KB Created: 2021-09-14 06:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0d3197a2c45afec7b56ff655a2a9efeb SHA-1: ec8ceaf98db75ed4a064c582af67d5444bf77587 SHA-256: 06d3afed49b91776ffbe8ad91c6d108fb16aa2a2ba593d7fe6f1d55b64047086
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or other potentially malicious domains. The ML classifier strongly indicated maliciousness, and the heuristic firings suggest this PDF is part of a link farm designed to redirect users to external content. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 5

  • 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://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/rqk4uol0vb4bcuj0i6oc57ks8f/susepidokexepag.pdf In PDF document text
    • https://viettrungson.com/media/Files/68333991840.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d2e9c1cfc---22520657845.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/85581191636.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/48391036865.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/38791658602.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/makimamozopowaxozujatux.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/rafoxalevosasarosimake.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/77655370217.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///juvadifupapijopuvipoz.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/zegudivejovavifarizagudu.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316b2492f2b---37097027361.pdfIn PDF document text
    • https://longhoang.vn/upload/files/6111382424.pdfIn PDF document text
    • http://platcometals.com/images/file/99738841294.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/fimobuloganorifefem.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/2su52tn2jjtcfc3upjfju43bb2/54754195265.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/neruraxelafigesuf.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/68815481013.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/palulurifunapebipe.pdfIn PDF document text
    • https://preciseenergygroup.com/media/bokez.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/44035520392.pdfIn PDF document text
    • http://travelbilet.ru/sites/default/files/file/53685390468.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/mafedelinerus.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/35743193006.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/66554462828.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/pezukepugupiwewogonimu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=bios+epsxe+android+downloadPDF 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_off0000d29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29D 10528 bytes
SHA-256: 0c12250f98c1d6d7ddc934cf65df018d2e366e559f2220d728f1b063c9099696
font_01_sfnt_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 21996 bytes
SHA-256: ec2389993198f65892d9ddfe87e01d6d4045fe1275a9fc62f0ec499c0c38cdad
font_02_sfnt_off00012361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12361 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1