Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8074b758e7b2e71…

MALICIOUS

PDF

90.7 KB Created: 2021-07-21 13:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5b0ca1fb1ad8ee6523738f8c60a43954 SHA-1: 634bcf9a89c5f6ec23725be5e67f113d569c4e6d SHA-256: e8074b758e7b2e71a974e49de382ebe124d9bb9e9f80e9d072af166ece3987e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of multiple external URIs and link farm characteristics suggests an attempt to direct users to potentially malicious or compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://tysons-cafe.com/uploads/files/womirunupalu.pdf In PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/ae5e9659a085804feeb2a05f80e51da2/soxazaj.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105022232112812.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/dipokamapefowireduw.pdfIn PDF document text
    • http://haus-st-otmar.ch/userfiles/files/wowogigugininijew.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/benuvudux.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/komumotusijulimofadulezi.pdfIn PDF document text
    • http://ridendo.cz/files/file/58800872890.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1337e55f6---kewin.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b0eb69e95---nefinem.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ec5245cba82---nejegexabonexuz.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/14753659250.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6bb38c1568d1af8346426782d0c8ded3/rugimaxejewaxesafomurabud.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c24c11f0f2---rodupetujoxe.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/cv1lqaifr8mgrkngqfdqag4tbj/54718076258.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/302d5b1ecd60ddfc31966c4bd961bb69/jekokubetizesa.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/8b255e8805f535c9802b2be863d0fced/64345365584.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/pukubejinugufogidirapub.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608387015d4c9---wufolesodigobokibobu.pdfIn PDF document text
    • http://mrmax.ca/clients/9797/File/9497677313.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/xiwikupoxeritup.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/9tgk91khtdkhm2bpgf9r8sec27/zijowavuligapivazemo.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/jinivagalunoxuriga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=vet+out+meaningPDF 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_off000103a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB9 16532 bytes
SHA-256: ca302d5239634805634c3c2bcf4b2570373f61beab03c4c6f1d77dc425a03076
font_02_sfnt_off000146bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BB 10208 bytes
SHA-256: e71f6641397edd5616df3d7523e540ae81b52b8d58c6a97d1a4f20cd1923171c

Open this report in the interactive analyzer, or submit your own file for analysis.