Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6039aa5876d4d4…

MALICIOUS

PDF

72.8 KB Created: 2021-09-01 09:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d3c61baf8bcb55fea270c013031319fa SHA-1: 65f089c73bc78f649a203cf0f58ef1ccb473cadc SHA-256: ed6039aa5876d4d4ba72d0867c00592b5930ca9b8113384d91b21e50b1d04233
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on potentially compromised CMS uploads. The document body is heavily obfuscated, but the presence of numerous URLs suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mitcostruttori.it/userfiles/files/pijuwaxarozogusojediwa.pdf In PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/386fa69b3a165afbcb4875b04e702c13/kujafezetukivonivuv.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/14934367143.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/ferefigajideverikef.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/pijosuruwoxaledutiviririb.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/87689155111.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/8lunq354nte8g8gdqgemnlv550/96456982085.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wujozapazoga.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/narazoxibepi.pdfIn PDF document text
    • http://i-dron.cz/data/file/zabujuwa.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/jumovinuget.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126324c3a09f---28760124349.pdfIn PDF document text
    • http://accronline.com/userfiles/file/jodetesebifubosepivewasuv.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/7af0447acb332e616e506c7f9173daf9/vasikeberemivox.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/fenepajivitarupu.pdfIn PDF document text
    • http://dringraldi.com/clients/7/73/73ccc230e5ee2b020474e4a43bcd07af/File/59485680901.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b97a96977c---jupusojemunevapazurux.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/92120009430.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/73474512044.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/tatijodojisipupen.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e5253a961---97332525208.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/hvqa0tv2bvvgsqbsbjvjfki7nl/76822596844.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/xojodaxebuvomigibo.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/79376106249.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/c84300c9fe5592a6dbb748b2c91d85e3/38350316267.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cobb+county+ga+jail+inmate+searchPDF 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_off0000bca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B6 15032 bytes
SHA-256: 4e16674141284f303fc9e3512103504a706b34cac00c1403f7b4c9fb830f93c2
font_02_sfnt_off0000faa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA1 11192 bytes
SHA-256: 63c24ec933023ef9a618a378d0fc456b84a9a11d402ef0f9396340307ff7d864