Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0cac802d5aca83…

MALICIOUS

PDF

87.2 KB Created: 2021-06-30 03:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a516c159ab8a540f3f6d39a14caf84da SHA-1: 4566dd5013a51d9f1b02baf3d151b0307976e11a SHA-256: 4e0cac802d5aca839d606006c257b1fd00385b39c56a0c38d677e6823efe0342
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of multiple compromised CMS upload links further indicates malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://garglob.ru/uplcv?utm_term=low+interest+personal+loan+unsecured
    • http://terralis.eu/catalogue_dynamique/file/8727583346.pdf
    • http://sgd42.ru/userfiles/file/28016035176.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/8c292ccdac91588d2b98da0bb1779e6c/ferazozojomodikax.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d19441a00a3---1160992542.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/e3bd83e8859cc81a6135a92ad3c08bcd/wixolutumaredidi.pdf
    • https://vettercycles.ch/userfiles/files/80846656926.pdf
    • https://marljivo.hr/UserFiles/files/lusavozijapibejufokivi.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b3225d179---2099840754.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/bc952f37b7d43ea22d70fd1d94255353/pawabivare.pdf
    • https://mtmnetwork.net/uploadEditor/files/watogukenevofifiwasuwa.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/2199b82220b6264ccf1148deca0e4f0c/4537541738.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/li74kbtn9sc1372r7oc92vcb83/vuvoxekidalizilesobisax.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/1402720909f5a5b928bb53261f2a67b4/mikizekawulojegimalixog.pdf
    • http://klpa.net/userData/board/file/37004436809.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607748ba76a91---65201375922.pdf
    • http://sartor.ru/upload/files/vodolinidizozufifo.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b161220f3---zivukadofusututedowufop.pdf
    • http://canxetaidientu.com/images/file/85022524107.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a407968b175---dodapopokowepepovilejew.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0c2628f52---nuxivedilinemijasekumu.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/4hp9df2b6tp347gnq5m3bom5pt/vasedi.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df437467ac---wuvejojipulajito.pdf
    • http://kingalbertltd.com/uploadedfiles/file/99328431446.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/90gsd075ts1cm1ebe258dglvkk/45830478554.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/taxupepolidanajotaga.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f127.bin
b1cddd88a3c3236fd0edbbbd41d3844789474129a123753540b1895859f56544
pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 10648 bytes
font_01_sfnt_off000109b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 16792 bytes
font_02_sfnt_off000121ca.bin
0b487b475f480e57278e04183c1e61430fce26d54bbf9191dc4d9d39d372dd22
pdf-font-stream PDF embedded font (sfnt) at offset 0x121CA 17244 bytes