Malicious PDF — malware analysis report

Static analysis result for SHA-256 799110630e3e2a35…

MALICIOUS

PDF

83.9 KB Created: 2021-08-19 16:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a2b903b8760257bd5d938b2633747b6e SHA-1: 7c87db18727014dab7d10515c6c805d3b59fd19a SHA-256: 799110630e3e2a35ffe5545f04d24c93414736b58e229b16609a0df89e92a94a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content. The presence of urgency language further supports a phishing lure. No scripts were extracted, but the overall structure and URL findings point to a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://webinaris.org/ckfinder/userfiles/publics/files/rusonizizunogafijeka.pdf In PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/5c89b7106fbbf6bde3cd58879cac5e05/90461885946.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/l9aa9j6s9bcgvbb5o1ndbll533/97188966333.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/3b352f568fc3a64ae761f96e4fc54963/voloterekigopipazalezig.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/dp1o6sigvkci4t805iumnsjbij/46819869399.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/32861164450.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/73d0aa95d325af2b9fe0967aacf07046/zekafenelukududibapa.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/2b7a4780489516d138b949ca16abe25a/powigotoxopi.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7cb95e1dab---vozuxefabusinibikajux.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/85a8bi4ug3qui9tpfuvb7tm7b7/3654347040.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/lofuxapa.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/95f1c835a2b3e82d5077a5af296c8b07/mugade.pdfIn PDF document text
    • http://texmet.pl/userimages/file/zimobal.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/sizugubosa.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/vusimexiko.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9d66014f3---19417153010.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/99080624101.pdfIn PDF document text
    • http://thecuriosityshot.com/mofufexuwevixadoniguva.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/0v3c0p4eur9cmjiu0967reb49b/47649028151.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/16778893929.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6be8307145---67346645180.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/61379350973.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/6393173825.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=naruto+shippuden+ultimate+ninja+impact+pc+game+free+downloadPDF 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_off0000e0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F0 11360 bytes
SHA-256: 0b8ea581bf02d8a56ba7bf7437a09f7d2b8ce3aeb6aa3b40cfd56bbf25773b8c
font_01_sfnt_off0000fb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 17372 bytes
SHA-256: bf3425d42169b2ee04b0989eb9e83619002c6b9f97910439c7a0e0ec017a8d68
font_02_sfnt_off00012930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12930 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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