Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e00008f228278d…

MALICIOUS

PDF

81.7 KB Created: 2021-09-12 05:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: faf0cffc8b2ccafae05a9a1d12abca7f SHA-1: 57dd9f739814d054407d623aa450601920c8bb00 SHA-256: 04e00008f228278d2015ec78a9c110c6010f640fd1250ee3eb9bc6c7e971096c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting a link farm designed for SEO poisoning or phishing. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The document body is heavily obfuscated, but the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://smidgel.ru/uplcv?utm_term=aruvam+tamil+full+movie+watch+online+tamilrockers PDF link annotation
    • http://tea-ra.com/user_data/upload/save_image/files/nawolabive.pdfIn PDF document text
    • http://snsi.jp/image/news_file/leliburunekusilokigulas.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/lajapunimakozaxalobud.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/79302297265.pdfIn PDF document text
    • https://duel.pl/userfiles/file/74368169997.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/62736946119.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f417599ad8---98970436852.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/zidakejivutimiju.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/4894445233.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/xakegijogedogiva.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed568de154---52506130374.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/32617022565.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/27448287760.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/vurufupiv.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/xarizoz.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/pilitamanowasavokawos.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/bamunerenasakeririjeruj.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/14992758986.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c970a468f6---49778160159.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/86347048613.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8862b798208e8f11418a7dee616897db/99429776184.pdfIn PDF document text
    • http://lagrupacio.cat/file/49407069742.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/28921767246.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/sekusagosenunuwadoj.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/gupofatigige.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/qggivvimgi1qsogda7k62u8r74/50081959979.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_off0000d8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A2 10928 bytes
SHA-256: 155fc019db66fee7d430c3af713703d6fd2fe12fe863e0f733737c6f3b3f3f54
font_01_sfnt_off0000f1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F2 18004 bytes
SHA-256: 75fd71fa3659782671e4baf228ea4ca517f8d7f126d8e35e35d61ac9261a4324

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