Malicious PDF — malware analysis report

Static analysis result for SHA-256 107f7e98aa728ec0…

MALICIOUS

PDF

83.4 KB Created: 2021-09-10 09:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 435c314a92d536e22c7dec9684dd7994 SHA-1: 3e193c26052448aabf021ff7089e689feff9cb03 SHA-256: 107f7e98aa728ec00e5b044843e53e56f31b02832c3309ee64a589026b75b7af
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting it functions as a link farm or a redirector to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the nature of these links, indicating a pattern of disposable hosting and SEO manipulation to distribute content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://inwebjor.ru/uplcv?utm_term=4+letter+words+beginning+with+h PDF link annotation
    • http://tahyuh.com/uploads/files/202109082022014662.pdfIn PDF document text
    • http://myesen.life/userfiles/file/83548533209.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613809aad4e42---zamajekakixatiz.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/papusemok.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210901205633.pdfIn PDF document text
    • http://scsytech.com/upload/files/sogexi.pdfIn PDF document text
    • https://le27.fr/docs/file/lotinajeluwarexavem.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/kiduk.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog/file/dumuzemenurine.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/suwenu.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/mewetef.pdfIn PDF document text
    • http://opt-russtd.ru/data_center/upload_pictures/file/27568215877.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/71059879759.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/79015583680.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/buvorogesogo.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/9361573976.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/35305881291.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/bemopuxipubunuf.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/79576685565.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/44915229206.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/72838883847.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/bejokagopaze.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/10924506152.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa420530e2---53137890736.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/jugexakarawaruzepozidal.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_off0000de70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF687 10572 bytes
SHA-256: ac9a27dcfab171d7ba32eff965f6f4db42e5c544da9623a6f320af69288dc4c6
font_02_sfnt_off00010e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 19612 bytes
SHA-256: b9e0153e23a74d89450ab563f43739dbc84e63e06f79f73bf1b1f26683c141e3

Open this report in the interactive analyzer, or submit your own file for analysis.