Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aafe85d5e2af2ed…

MALICIOUS

PDF

85.6 KB Created: 2021-08-16 11:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 192d6df2257c67f266d3ae5548d399ad SHA-1: 3c75ef654ba1e96a91e2b1b58fcd56a89ea9ff30 SHA-256: 1aafe85d5e2af2ed439ee3cf135fc46126fb58f91fa4fc7d8bc02978152c761b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://allytemp.ru/uplcv?utm_term=rapidex+english+speaking+book+pdf+in+marathi PDF link annotation
    • http://beepost.vn/upload/userfiles/files/80615613699.pdfIn PDF document text
    • http://azizolace.cz/images/file/kagobusolofenimebugu.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/236330c17857c274b5c5c93025fe6a55/tezebedez.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b0576f3d2---loxumazeje.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a80d216a63f---towowipufenavometumam.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b1285d9b847---5470739291.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c574561427---14597277787.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09c25b1535---72003749361.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/jp9mhjn6mvtebkgddvil4a7l7f/xagewavalonaregi.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/53190536844.pdfIn PDF document text
    • http://ridendo.cz/files/file/59744310415.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/ed4a63ec406d53c9c157525fff93110d/bosavekunokapug.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd8e69e428---5464715648.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/1ebb270c9f8efd988a1e7ad18ed34355/29188036340.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a19aac3f110---79053825574.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/repodim.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc192ac6c8---68351573616.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086257535134---podamumopazutoz.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dvp4t89ouu5ufvpm8bo4ktouj/kipogazagosipug.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/nuborefijoveve.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e968df17b---49590654195.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b84861df88a---jatupobo.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6b7bdb8aa---gesonabubapitowujen.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/23878292348.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/1d2570f1e9983ef32bd89aa44b72b7ff/60979255493.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/80329518069.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/86666598414.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_off0000e960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE960 16992 bytes
SHA-256: 0a0d1f8ba90b4b7c0cf0c87987618e780c674efb899fafd827ea99856e0f6fba
font_01_sfnt_off000115b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B9 11324 bytes
SHA-256: 0ca49d8fd81474973baa6bf5b503a89f7bd5bbba66ae5e33ebdecc81559578d9
font_02_sfnt_off00012fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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