Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f989fd7ba239d2…

MALICIOUS

PDF

83.8 KB Created: 2021-09-15 13:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 03b3f265b86974d3479a28478b734825 SHA-1: 78caca2ee2b6e41a7e8553c1631336d5ed27cae8 SHA-256: c6f989fd7ba239d2e95bc5a589e4eaf5fba6e4cf44edf43f665fae2cb8bd7d5d
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 external URLs, with one specifically identified as part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=drawing+apps+for+phone PDF link annotation
    • http://progettogeometra.it/userfiles/files/24657784319.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/zikefosipotepubob.pdfIn PDF document text
    • https://abss.pt/userfiles/file/sunemewo.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/mavikogejom.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/11815460421.pdfIn PDF document text
    • http://unsersohn.ch/images/file/kutazanisawufabefipor.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/juloj.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/34945421693.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613285793dcde---tevul.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/jonevivanivotatiwewilig.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/difipa.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/74362118577.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/45484101562.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/13208807359.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/wimikuvopivun.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/51447565756.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/gunipebatuvimesusaduvi.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/95481031663.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/96196007853.pdfIn PDF document text
    • http://www.centrosanmarco.eu/img/news/files/62124263691.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/4012973091.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/tijefolok.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_off0000e4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 10580 bytes
SHA-256: a791eb9605cca6b359e671284ff5d62669180cfdcf821b08e71f88b5c00c18ba
font_01_sfnt_off0000fcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11510 17652 bytes
SHA-256: a56a378174956c972cd1395798e8292d34851461ddc1eed7b453074082583b8d

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