Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6489922eb36075…

MALICIOUS

PDF

85.7 KB Created: 2021-06-27 23:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6bfc340a4679fa8b98a291101db4aea2 SHA-1: 43d034fae4dc3fb2549bd013110b1d2dbe631a89 SHA-256: ae6489922eb36075ab790491eb77ea1eadfe322379bec7042f72dbb17dc4d377
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The PDF structure and embedded URLs suggest it is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://nomylo.ru/uplcv?utm_term=can+you+apply+polyurethane+over+wax PDF link annotation
    • http://italianopizzeria-pg.com/uploads/files/86306572092.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160c5def31ec31---xogepavulibugu.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ec291a342---50372727303.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/74356877489.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/5sec6ni8u7eop82sk4g73ctbq6/medona.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/18357305969.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719efc7f62b---xuvir.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/xujabagivazat.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/5jfdumdvk2eovgj2ok8pusj2kk/19393011152.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5c7b54b40---72406993309.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/dikadigeverajogufaguwax.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/87505211165.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/b5a93d60610e122705dbc1dfe46d157e/fabifudivujiwewekar.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/e4c3c10ff5bdd952908125767d26def3/woxefe.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/kavefegate.pdfIn PDF document text
    • https://rm-parketi.si/uploads/nupigaror.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a67ea2da9---33913231918.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5eb58feeb---peruvelegis.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/6m6fhaak8qkuo7qf25uh6vkdti/99629211801.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b3502aa4a---xojinuxafetesawofaledodaz.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c280c3afc9f---37996611747.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/lepetofefolowan.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083235c7a683---fimatal.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/4ce4b5da27c7791c9b04de0da72a3850/5792506185.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/doweziwenagixo.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 17260 bytes
SHA-256: deeb6bf74826dfb06f565e20c680a2694125fee76b3a7af130602a692606c4f8
font_01_sfnt_off000118fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FA 10588 bytes
SHA-256: 18ea7e924a810c61ceee090b3bc4b7c94d01bcff3ce529855cdd3b5e72ef122d
font_02_sfnt_off00013137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13137 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1