Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e8b24fab87b777…

MALICIOUS

PDF

82.1 KB Created: 2021-09-08 20:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e6ed92ee3db93ac196ea017ffd258a75 SHA-1: 4660b2f3874096d2334f6f34867dd23b8f2e37e3 SHA-256: 85e8b24fab87b77735847ace79c5f61effc70f9d54daeab147ac7570967fb10b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm on disposable hosting, with numerous embedded URLs. Although no scripts were explicitly extracted, the PDF structure and the nature of the embedded URLs suggest a phishing or redirection attempt, likely leveraging embedded JavaScript for execution.

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 http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/95773482489.pdf In PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/161303381e81a6---fedikojimebobopad.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/78068756274.pdfIn PDF document text
    • http://www.agot.pl/upload/file/xowikelapirexageliv.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/30289405933.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/xotakuzulajorudetinop.pdfIn PDF document text
    • http://teplospectr.ru/images/files/44863161748.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/petab.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/mademedodufosulusubanib.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/71700035679.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/62445964735.pdfIn PDF document text
    • http://www.centralperdana.com/file/nesadebulodar.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/74509584508.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/kivifepujoronosojudo.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/zopogotulupazabogod.pdfIn PDF document text
    • http://feg.vn/uploads/files/76082350650.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/b7ff243ae6e24db2819d94abd60da3b7/lagewutirobifevulexuw.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/6523788107.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/fakemepavofu.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/50371203713.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/wiwagusixoranelojuwudo.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/58117109770.pdfIn PDF document text
    • https://renewone.de/files/vafafonurewemip.pdfIn PDF document text
    • https://galaxytraining.examinationonline.com/files/72758207697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=rotterdam+smart+city+pdfPDF link annotation
    • 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_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 10792 bytes
SHA-256: 714c56ca656d1c75706612d72fa665a59a5f8cd18d874fa652416c47c35750a6
font_01_sfnt_off0000f51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 17664 bytes
SHA-256: d5cf4f361efea6d2279f6123591a242bda27c91b7c385416bc64fd9f346c2df5
font_02_sfnt_off0001229b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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