Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76121feca776aed…

MALICIOUS

PDF

98.0 KB Created: 2021-09-03 04:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2f6ad856e4c5012742d9e46ec9036ee3 SHA-1: 87ba04e33da9cca20ab3900ffa16d817d93f6b98 SHA-256: e76121feca776aed4e6a58383a3bff30a83c9ba1d8a3d0c028d506b020308110
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, with many links pointing to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://drafthe.ru/uplcv?utm_term=smith+and+wesson+22a-1+manual PDF link annotation
    • http://php-lounge.de/userfiles/file/xagudumugexu.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/60853049230.pdfIn PDF document text
    • http://tinnaduraflex.com/uploads/files/65996938122.pdfIn PDF document text
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/xonononaroxoligubavedife.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/sisinedo.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16116d5084d085---94604417553.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/riguwomidas.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/46548762732.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/nizuz.pdfIn PDF document text
    • https://huanghecables.com/d/files/25784709305.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2039557489---94337910654.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612e5d3d9e006---15279993449.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/209fac6c0795d38d10545352f71ff71b/43689765951.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05417d8d12---68784169509.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/tikazanujutipolimetefe.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/fodadono.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/kosowekitivejas.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/3fc93961bf0cee5eec661fe4075c08ab/vorowokive.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/kobatezerenedegujorabuxi.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160bafcdbdaf64---sejejivukogisajesak.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/lolexibulidefoposewoxiri.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_off00011750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11750 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F62 19416 bytes
SHA-256: b2f0c976ad86abec8c967e7ac930edfca168683c5104c24d001908ed37e11be5
font_02_sfnt_off0001619b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1619B 10880 bytes
SHA-256: ba0bc8581360ac60c68ad0b0376d2ddc16ba66214e49c3eccd9c9bdc98211513

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