Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d0078af0f0d06c…

MALICIOUS

PDF

82.4 KB Created: 2021-09-01 07:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5684fd10f7b78ea8707bbf9c65979362 SHA-1: 9d2e81ee644d9df4ac302b1d08b297876ffa4fd3 SHA-256: 36d0078af0f0d06c5777f7a166b6c768c51b73e42db6a669160328b3bda4ac21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://essaidafm.com/uploads/FCK_files/file/81994747585.pdf In PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d55fb138b224ce8bc33ca3e4870fac1a/72372060323.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/88595729475.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/zizojibimisinufebi.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/75979238573.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/cfilc5ev6lrlv9tjdqtuko2rcv/tabevimejarojirafedirera.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6e977fead---42186160526.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/gr4q9v32ttcbcupn6c35jlok5a/gomiritulebudizikomutixi.pdfIn PDF document text
    • http://maimungkorn.com/UserFiles/file/23268832105.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16107f2d7984de---20389176289.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/ed2442544ee8f38917b07c69e9664c2d/23684153148.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b9be1214d---50910851188.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/ribifexalepato.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/cb8d9eee309bd71167e7fc4975e38191/zewubemak.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609669a3ae1c9---8790945927.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/62236127778.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4af328a071---14237818464.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/bujol.pdfIn PDF document text
    • http://spiregene.com/image/files/20210811_015055.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c7a495c218dae339bf15645e037357ea/petuposegowasunowovag.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/63518827410.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/koditavexetevixorovuwil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=females+and+aspergers+a+checklistPDF 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

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
font_00_sfnt_off0000df10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF10 16728 bytes
SHA-256: e0cedbd47fd1ffe58e0b2bd4c71b7779eadf7ebdacf035f25aeee89357d75848
font_01_sfnt_off00010a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001226d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226D 10912 bytes
SHA-256: bb4a7dd0b644289bd5e749029a38445f26a19b12c5a7efea6b9e05860d45016b

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