Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3222b49ab9b7ad2…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 11:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa18dd37fc06ce7874b4403210349572 SHA-1: 4d695e53db62ee4a0bdf971eed82b0105428af14 SHA-256: a3222b49ab9b7ad25c1c1cd0b5a1aa9ed8201082d7451cbd59f1634733ce8b8c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and a large number of external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic 'SE_SECURITY_BYPASS' indicates the document explicitly instructs the user to disable security software, a common tactic in malicious documents. The embedded JavaScript likely facilitates the execution of malicious code or redirects the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=apk+editor+problem+parsing+package
    • http://tnmetalworks.com/images/files/zojudorabozibedirogu.pdf
    • http://exosushi.com/uploads/files/38732348414.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/4010877cddbccb6381c5597b9fdf568d/vagog.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f2a3f7d0163a9b75d7eb26a91472ad75/kijubinujazunuwotikifitu.pdf
    • https://hanedantoptan.com/upload/files/87583863322.pdf
    • http://studioingtassinari.eu/userfiles/files/mozodizexe.pdf
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1631746811.pdf
    • http://sitoad.com/bbqjoekey/files/202109122029146315.pdf
    • https://butterfly-propertymanagement.com/userfiles/file/14291499453.pdf
    • http://namadagaskare.ru/ckfinder/userfiles/files/63807812621.pdf
    • http://okuninka-biale.pl/userfiles/file/22472125342.pdf
    • https://sanghvicranes.com/staging/media/49469182595.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2630a1451---63410729846.pdf
    • http://jcpingie.be/public/files/jiwug.pdf
    • https://gotoko.com/cmsv2/upload/files/33553211541.pdf
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/71969149180.pdf
    • http://ozona.pt/js/fckeditor/editor/filemanager/connectors/wysiwygfiles/file/poreziweg.pdf
    • https://123natura.com/stockages/files/zufirezewid.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303d515441b---24112312481.pdf
    • http://www.lovebliss.tw/UserFiles/files/godudipadujomopabam.pdf
    • http://okfilm.kr/userData/board/file/jejetajofoluzonatumapop.pdf
    • http://berbun.com/user_img/file/bodopazovezadozeminewopi.pdf
    • http://lsneotek.com/ckupload/files/kevetujekizota.pdf
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/43486488002.pdf
    • https://contact-house.com/fckeditor/upload/file/fadotopafunasi.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_off0000e2c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C8 16792 bytes
font_01_sfnt_off0000fadf.bin
6711110f578db3d83dc67d353016a719f0e3e56fcba9b7a3ff258b633b66d48e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 11068 bytes
font_02_sfnt_off0001143e.bin
d883c947266fcb03cb6e0d4965ef7e6347ea4b2e6a29bec84fc2ab3f390d6aad
pdf-font-stream PDF embedded font (sfnt) at offset 0x1143E 18704 bytes