Malicious PDF — malware analysis report

Static analysis result for SHA-256 f550c9e71904d486…

MALICIOUS

PDF

96.1 KB Created: 2021-06-13 16:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 043ebc9812e1b16f3aecb9bf8ad50775 SHA-1: 531c59dbc5ea40c9551023ba45ffd43c8c5917fb SHA-256: f550c9e71904d486362f38af495f75b6e3b0b9a89cdfbe7b9bd8ac394380a4b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to 'cheat codes for evony the king's return', indicating a potential phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pixomot.ru/uplcv?utm_term=cheat+codes+for+evony+the+king%2527s+return PDF link annotation
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b63b8f99c59---79456736156.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608fde6a8004c---42885889914.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/562a00f4acc791aeba6219b979130762/86838359502.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/bapemumilemen.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/39150632457.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/2889b9f74bd6c9283f5b2de83ff0e606/22290163990.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/logenusakotax.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/dutakiraroj.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/99456230422.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/xudujogomalunogovitomaw.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/5ffbb141939e6eaeb876fd587cbcc640/39990123720.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b159f961b88---wofalufimejojaruf.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a3b98def4---87902944079.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/aa10ab734e6dac356c41b41ec3fc4853/25115547659.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/676dc53b7bdb2fc7d1acbb5249a9e1dc/sefaxopubuwotesumumunom.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad585482e3---21015196424.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b4b9044ca---97856442088.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/23cf04f917dac0ef0dc3d5233b877f15/38037319657.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/lvobf1s7513eopdjcmtc4pvnvl/54356555552.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/rju90616uaptqig057sgipn6r5/61777763984.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013c63.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13C63 30288 bytes
SHA-256: 3226166bfeb95b35a913c08ab3d79d4e9e861f9cfe10cd039ea3a8856a0c9c78
font_00_sfnt_off0001019b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019B 5416 bytes
SHA-256: c36d85083568a41856acb20b1495532d53e0fb31b0ee7eafc98cfbe231aae7d0
font_01_sfnt_off00011412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11412 12652 bytes
SHA-256: e87f43ef68b69d0523bb1ecad0ed21e3480fdfa66fd960f53d7e5155606bba29

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