Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb80b9ce9338bbf…

MALICIOUS

PDF

85.9 KB Created: 2021-06-27 03:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7eeb179842813e7472f12321f43a2f10 SHA-1: 77c1350d87bdc71835e31aef4250408aec2f9666 SHA-256: dfb80b9ce9338bbff3bfec8f8eb3384be39f89f3b0f777e9e9159e3c2fba1e59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, suggesting a phishing or malware distribution attempt. The file's structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=history+of+education+pdf+download
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083b5ed8d4ad---93152786787.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5d966f2cb---22375676475.pdf
    • http://jinanxintiandi.com/userfiles/files/mesejonerogiru.pdf
    • http://onlineexpert.in/userfiles/file/roroxanifuxarufodin.pdf
    • https://serviceservice.eu/userfiles/file/deweba.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/d589l8fbm6me1ga58oiu3eqi1a/vizam.pdf
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/9vl4oavf5uqlilpng9u7iqp7q9/xanipolejovitomupesubidof.pdf
    • http://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/pijatodipipunifabuxo.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/8iu9q7sb744gub4hb86k6bvcom/kipaludove.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609985a8a6e7d---73689932473.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/e0ae05b65f18378d979ed797894a81a1/ziwesilidiminuxogamomij.pdf
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/61162765348.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a7944f6db3b---nijibetowupurivijezeli.pdf
    • http://antwerp-reefer-tournament.be/argt/files/45717366081.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c786959cbf---5511598736.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4b5bda7f581a3eb032baa7e298b4c010/83063393454.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084afa59edee---fegujufejamonisapalin.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087757001867---polomuwewaber.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/u3j5kc7n7vllikb41hn3ucrnbc/dopuworofofutiwuzowe.pdf
    • http://kleinschaden.expert/userfiles/file/kekebesikobadumede.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/2a0475def39ba0f99514f3edbae2a6ba/bovewodogigexiliguxoser.pdf
    • http://apexnepaltravel.com/userfiles/file/43310015903.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebba.bin
7bff3bce6c93709c3e53eb698ae618d95140daaa85d592bf6b4f29ee794684ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBA 17324 bytes
font_01_sfnt_off000118c2.bin
c82ff229df2a3b93acde35ae4708bb49f597c13fe4e74d0ed052f4531962ed74
pdf-font-stream PDF embedded font (sfnt) at offset 0x118C2 10904 bytes
font_02_sfnt_off00013235.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13235 16792 bytes