Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ffc6e0af64562d…

MALICIOUS

PDF

69.4 KB Created: 2021-09-13 23:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dc7ecdce49ccbab7dad00d970a30e54f SHA-1: 41c1d04d7d6b5be118e8e459f1bab6113614c3b1 SHA-256: d0ffc6e0af64562d75ad4bd63e11583327da012b94edb8ef0c383faa6f9bb09f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The presence of embedded URLs and the PDF structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crewmak.ru/uplcv?utm_term=creating+android+app+with+unity PDF link annotation
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0fc2dd2aa---49695369751.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/15828776788.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/ratuvagodukupudijamulala.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/kigovezuzosij.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/xivapagazem.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/64174741728.pdfIn PDF document text
    • http://salt17.com/userfiles/files/daridinuvufobozozakowagot.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/nuvutuvedoxiwa.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/vegarifisexufodogojanur.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/83242321210.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/99328456916.pdfIn PDF document text
    • http://xibuhuanyu.com/filespath/files/20210902131203.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/wujinizulejovup.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/besegutub.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/b0l074pfr4q2go7pvp973ooue1/weditolipoba.pdfIn PDF document text
    • http://selidbe-beograd.info/files/faratumegu.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/lipetidopesijurakoze.pdfIn PDF document text
    • http://fullerton.kopanramen.com/uploads/files/90097248915.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/29031838628.pdfIn PDF document text
    • https://nomortiga.com/contents/files/49848378555.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/43536960786.pdfIn PDF document text
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/81081773001.pdfIn PDF document text
    • 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_off0000b224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB224 10788 bytes
SHA-256: 1726e141dc14947827e5347c20cb72cbb04690f9d59e00f710fc87ec49459d1c
font_01_sfnt_off0000cac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 14916 bytes
SHA-256: f6c6a6689f1dc50b6c099248969e21725d740cae97b51b6b8493ddeab6687745