Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4ac1af7900aabe…

MALICIOUS

PDF

104.7 KB Created: 2021-07-29 23:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8304aa01ee1cdf02f6abffdfbdf3cf1b SHA-1: 118b995c303b668138f825c8ba60dfd7a80a7f35 SHA-256: bd4ac1af7900aabe0cc86aced1007e348a0d9fbaf872287d8373f4e5b855f14a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to trick the user into clicking these links. Although no scripts were explicitly extracted, the presence of numerous URLs and the ClamAV detection strongly suggest malicious intent, likely for phishing or delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606decffd17ba---29724072171.pdf In PDF document text
    • https://censcakmu.org/board/file/files/89968057874.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/88542161937.pdfIn PDF document text
    • http://ilovemynewstemcells.com/clients/865932/File/77869872579.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be0481a4c0---61252798376.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/fupenexilulem.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab77b5d20ec---gomatowatudurajekuwok.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a99d34627c2---7889354601.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/sepawekodonixavogerupivol.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/3a93d34f91759cdd61cba75c301fbd74/1141159464.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bfe66cbc5---womofipigawijufefuvapo.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/71009580386.pdfIn PDF document text
    • https://bamor.org/userfiles/file/forifonozorin.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/ca4a99bae0f77a720987658c0ed2e010/31398651562.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents//files/lasefazusebul.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents//files/84876698790.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/pufatilakeredezodusuregej.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/1540d3417b71e29b43f4b27933f30931/78395217039.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/59851633066.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b525ff8a5a6---28274346885.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/21167875670.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/rcdcb6k3gadlrdfmj1b62e4ri3/wesumagevoratike.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/55624558913.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/99944504599.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/wisovuzenelevixogel.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/780cd7525cb8cfaceea77da146016246/tejifujiwonotudow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=canidae+dry+dog+food+feeding+guidelinesPDF 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_off00013641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13641 17180 bytes
SHA-256: 7fd69a1d00f246bfb3903ec87ebdaa977c69a020ff4a2060695f69f8074ea5fe
font_01_sfnt_off000162cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AE2 10676 bytes
SHA-256: fd19716a945e89434c2b09bb13be681fda9e0a64a2fb0d9b53c7ea98dfcbeebf

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