Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae41602fa9bd8d6…

MALICIOUS

PDF

81.1 KB Created: 2021-09-20 12:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4edeedd52945c60e50966588be704b4f SHA-1: bc40b4314616e1db9ad68b29af83c60aefafc8a6 SHA-256: cae41602fa9bd8d66c693f80377b1325dccb0a325025bd7516a43dceb9dd3654
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. The heuristics indicate the document is a link farm designed to redirect users to potentially malicious content, with one URL specifically mentioning 'adobe after effects free download crack 2021', suggesting a software cracking lure. Although no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://we-plus.tw/ckfinder/userfiles/files/xegonuxekoravamemakar.pdf In PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/84a34fc5a9e0e414254900f219f7d759/30379758375.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147a62568cb4---nelotopemogesi.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/volosadajixufolafofufug.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/lubarotofawedabag.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///sogedefapumomow.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/kamiwet.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/pokaremesitapujozorob.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/wosovotusesixad.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/35904951893.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/vitajukaja.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/bivopufabusidinoje.pdfIn PDF document text
    • http://travellerisland.com/files/50642554309.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/32201002828.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/remixifegakusesugiwuze.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/5850771140.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/xagopudefunemis.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/gujepo.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/sazaromulin.pdfIn PDF document text
    • http://poptheme.cn/uploadfile/files/20210920_171805.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vuvipofivagorojumugabujo.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/12401639394.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/wapewinit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=adobe+after+effects+free+download+crack+2021PDF 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_off0000d7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 17592 bytes
SHA-256: 03ca78d37cd7b972cf0914c1be882e131303d47aa9a569e3a4ef2b991f9ac159
font_02_sfnt_off00011d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D41 10972 bytes
SHA-256: 1883453a650883258fac377ebaa613153705f0a03a6132bee342408a384ef923