Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2a879adb5a7acc…

MALICIOUS

PDF

83.9 KB Created: 2021-09-21 01:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 33ee387cb691e01286dc35f481454056 SHA-1: 2d43be60899822bc4a75d9e07fe6a3bfb14377af SHA-256: 2c2a879adb5a7acc1f73e5fb26bed1807dd218150d3fd5a0d211aa3eb4ae57c9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to potentially malicious domains, and exhibits characteristics of a link farm. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external sites, a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://proxima-design.cz/files/file/peruna.pdf In PDF document text
    • http://soluzionebenessere.eu/userfiles/files/90741940148.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/vapanot.pdfIn PDF document text
    • https://bdata.vn/upload/files/lumupigoditasuzovifutusok.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/54381532553.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/9478583083.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/46076020983.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/19258681408.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/22896485849.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161431ad806123---gazuxowatew.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/vuwedodokekutanunej.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/25286790829.pdfIn PDF document text
    • http://www.veslovani-vsb.cz/soubory/file/bonabevaduvuzu.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/58178663771.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/xajurolebep.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/82154129872.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/83678219987.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/jutiwuz.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/8261525740.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/xuzajometobekizuzifo.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/bilokovapisofu.pdfIn PDF document text
    • http://baoveantam.org/upload/files/23407138445.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/6483923629.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/gidazobaxikog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ghost+and+goblins+apkPDF 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_off0000e002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE002 19564 bytes
SHA-256: cc6f242456f8ed1c0df4a201f54a4a72d1e4b9a56ccb0b81fe5952a7c61c90a1
font_01_sfnt_off0001125d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125D 10712 bytes
SHA-256: ecffdec232376397a9c71e2f38e4815541f69a823eeb0b05a3a16f3532c537b4
font_02_sfnt_off00012a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1