Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c67c4f4eed62ef3…

MALICIOUS

PDF

91.1 KB Created: 2021-08-05 00:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8ea0396247e4408b1ff6ae2f7946df88 SHA-1: 1d4e637ff0c1ede659855c0f32a6f2b9ef753924 SHA-256: 2c67c4f4eed62ef3c9c25d00bcf80d6dc834d8b3e172ed5c78003bbad235ea11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV and an ML classifier as malicious, indicating a phishing or trojan payload. It contains numerous links to compromised or disposable hosting sites, disguised as a Europass CV template, likely to trick users into downloading further malware or submitting credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd97cd0f585---dopinajux.pdf In PDF document text
    • http://emailreceptionist.net/userfiles/file/foliwozegamozilizis.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/0c408fae73b4c972750310f7425cb9db/28770328622.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d1f7063cd---48387167667.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5e77768d0---jotodanibo.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/fusojaxepefojavax.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/35714754314.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/lotamekesimewigarikupuz.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/52998467824.pdfIn PDF document text
    • http://gibisch.com/files/files/15199188050.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/c9c4cfd592aefca7ec61a770f33638e6/27013101349.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/17131307319.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/48365508429.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/4a23fc0c5af1c3e9a6fe330fd22e53b1/kabaputi.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/e1tg6r6bsl71pu654c4rjhmle1/nibamiras.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/zejetokozu.pdfIn PDF document text
    • https://egf.tw/test2/images/file/21470558414.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210718111119.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/26341088881.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/61276439824.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/nudigelirababokome.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160adb46c911ce---jovek.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/votaremi.pdfIn PDF document text
    • https://campermagazine.tv/public/file/jalola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=europass+cv+template+english+versionPDF 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_off000100c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C7 17024 bytes
SHA-256: e1bae0b062470b8d743aefd0b3f03c961da300f845e8ea519d14a3230a9dcc66
font_01_sfnt_off00012c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C70 10968 bytes
SHA-256: 5f1dac7300a64a313d7aa1d36c45a6397877be2275d435499bfd6e6d9e0569bc
font_02_sfnt_off000145be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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