Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1012069a7da2ee…

MALICIOUS

PDF

93.3 KB Created: 2021-07-05 17:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1d481c20a5abb21f2172dc3d30b5b94e SHA-1: 6a8fc6068a23a66a2e7be3269c3c25547ae34f31 SHA-256: 1e1012069a7da2eecfc5645434189413281a12d6463ad10a729bc8d92a878411
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm hosted on compromised CMS upload directories, suggesting an attempt to redirect users to malicious or phishing content. The presence of numerous distinct hosts and the use of UTM parameters further support the link farm and potential SEO manipulation or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078d37039baf---jadavobu.pdf In PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a19326d7d1---bupinakaxozeloluxosojul.pdfIn PDF document text
    • http://industrialdevices.in/uploads/wumoratavurovozebi.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8d6b98a57---70692908644.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072ef9d37046---bodunuvodumalakodojadipon.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/4rrfpb9g3lncnbllc3sks5ue5a/jupugosobi.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/tdjri6v3efepvq6pv948qqp73t/74894503909.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/pegekevopezagag.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/tenesakesixawetu.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160b0405d6129c---82008177254.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e376839a22---dibuba.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/31673858446.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/ce70c70647f38d23e7fa583322198d5e/56224624317.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/82b4c8b3527952d18982f1716f913948/wilekid.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/73854323236.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee69058792---duvowomoma.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/d3b2aabeb5b82769bf7973fa1d738c3b/65966927861.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/c73d9segc8k7b4ipc9esgd0gk7/6010616163.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/wifilujogibolatarojura.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/16490074927.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609229eca6296---nuduxofajejitig.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-4-30/20210430080554555642.pdfIn PDF document text
    • http://xycrusher.com/d/files/zetaze.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/92572be400416ffd9e1f5dc1e0e08691/fexetoka.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1395e3fe2---tinumaravemeguz.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beea4419f02---kezavovuzagaji.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/999542b2095c56dab2860c4bc643d959/19577804110.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=stereotypes+and+cliches+lie+definitionPDF 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_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE0 19368 bytes
SHA-256: affbf6cc0839da967d23625935f7afcd40712d0cc85875da6c6a755a3e2bef77
font_02_sfnt_off00014cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC7 10908 bytes
SHA-256: f89878e3a7617ecfc7a95b2a9220f00b556f5f493e632db1ecb80440c591d0ab

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