Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e1d43aec8756cb…

MALICIOUS

PDF

86.0 KB Created: 2021-06-28 01:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 57782c708bfca7db9396cd3c30f052b9 SHA-1: 70bbb099517461a422b8861e5594ba6829a31f5f SHA-256: 61e1d43aec8756cbe93dcfaeb92a14fa6480e645d9f3ba4fb6f194d68dce8fc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, likely intended to lure users to malicious content. Heuristics indicate the PDF is designed as a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. While no scripts were directly extracted, the nature of the links suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14498a5b3c---89969358712.pdf In PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/ee45e8e85b2c73a4dc3836a7b5e6ad4a/82217211020.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d71c51dca---dimisinatexafowezi.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/cosn5fnvkuhn8lppplgj4gjm42/55904448342.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/vibaloziluvexufevi.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe24fe5af8---69937270180.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b99b8f3551---jujuz.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/rojikakun.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d97e5f9b9---mozetiwizo.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49b958c3d3---bonoxuxisatiwejavojopu.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab88e58a4---98796076487.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081020a76e3d---73590219800.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/1bf1225ddf87787fedf473b78bc3296e/fekevosixorowumenu.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/7b117bce11c793b04421c95e5082dcf6/19380098024.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d370232c657---4134264550.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d5c2b484065db8f49124137e39d4c443/wapaketojasuwavadof.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc102d74d5---zadosapofepisenifiloziz.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094bdbd27ce7---forilorafanegi.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/7dtpplr3h03ceh5et9dn1knobn/muwilepobowonejem.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/98502470409.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/lixesinisut.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/95bfbcb41156443c83f9eab75e405c6b/gelav.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088745358e94---dijezosomuwukax.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/56492188653.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/cb154f3bc705a9437dcc6a996746c2f7/towoketiwakukurud.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/85401176683.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=count+to+12+sesame+streetPDF 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_off0000eeb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB3 10436 bytes
SHA-256: c1d0663c2e75c0acb16aad0858389166d1c5f5cb0669b46ded455960ca659418
font_01_sfnt_off00010680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 17028 bytes
SHA-256: bf48db81de816100f0380c93c72cc88c25e417e89b03313b706c4d5ea4762b0c
font_02_sfnt_off0001327b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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