Malicious PDF — malware analysis report

Static analysis result for SHA-256 747bb47b5e24da27…

MALICIOUS

PDF

87.0 KB Created: 2021-06-27 19:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4cf88ba39dfe6469eea675041763eacb SHA-1: 607a3fd2f5df2bc0cf246c68a7dfbdcbf0feebce SHA-256: 747bb47b5e24da276c559baacfa4b669a5245ae0641b2370da5eb3c6d684f242
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document's content, though heavily obfuscated in the provided excerpt, is designed to trick users into revealing sensitive recovery information. Numerous URLs embedded within the document point to compromised WordPress sites and disposable hosting, likely serving as landing pages for the phishing attempt or hosting further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://laborke.ru/uplcv?utm_term=introduction+to+oops+in+java
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/e99948c957146b908d38f01869ac6b64/93476264344.pdf
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/50396087854.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b37833bf6---lerebulujowawapubusogume.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/72443795391.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d75ce94e8---17315493580.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/sd4b4t43n6piiugaf0jugpc558/zosaluj.pdf
    • http://cmuniontravel.com/userfiles/file/weworesatuzaxipamor.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/05352217b0c917c5bb5f52d62fdb43ed/goxiposenuxijatudesekani.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee4bd63945---82505514459.pdf
    • http://fuga-hotel.com/CKEdit/upload/files/93318955589.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/vn8cv462a06m6sg5lm28p953t0/denevomilodevubirefuj.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1928fc1d97---24559066118.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/cc8cf3b50266f6aa5fb5ba01f7bf5015/zupokago.pdf
    • https://dancleland.com/img/upload/file/47733956151.pdf
    • https://acronimocostanzo.com/userfiles/file/gilexopibijopanapune.pdf
    • http://mastera-mix.ru/ckfinder/userfiles/files/xedetosugobikadonuv.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/9ee36b8ffe78e352cca029cdbd56fb59/fawemejug.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/ccaafe16804f5a9b0ee6313686968c5f/kerosawonikadamexe.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3be16189b---redodiporefa.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16096d52ae32f3---natogufu.pdf
    • https://gw21.ch/uploads/userfiles/file/70960672197.pdf
    • http://apsara.ru/userfiles/file/dobiradotomavoxabu.pdf
    • http://hglobaltour.com/FileData/ckfinder/files/20210602_71F3CEC173C9DF4C.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_off0000f1c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C5 16792 bytes
font_01_sfnt_off000109d7.bin
9347066f10e844894acc81aa0b7c75784212cc37d972b2360ad82b45a323989e
pdf-font-stream PDF embedded font (sfnt) at offset 0x109D7 17404 bytes
font_02_sfnt_off000136bc.bin
ebfb6dcab0d85c21c7456b4d1aea36b881e42ab11e6966e52a5fb3277ab7ad37
pdf-font-stream PDF embedded font (sfnt) at offset 0x136BC 10576 bytes