Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37292fd19470a79…

MALICIOUS

PDF

76.2 KB Created: 2021-09-21 11:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 21306f587ad786adc2eb4612e4bdfaf6 SHA-1: 4afbc8bbda6ef7cead96d660ae8d8055243d693b SHA-256: f37292fd19470a791273dccca5a0e6d0cfbd4d803ffc12b48f8088b85d5e30be
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The presence of multiple external URIs and link farm heuristics suggests this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.2303

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://vedepcuaem.com/luutru/files/43355198858.pdf In PDF document text
    • http://www.kevimotor-rock.hu/files/files/51286147586.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/savusajatejaduwesoboxen.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/33631502994.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/jogetigibosaviwese.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/tawenadobivemasewejuvus.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210910_7376E12AF6501E59.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/magovusokomibu.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/sesajitajibotojoma.pdfIn PDF document text
    • https://cicimanis.com/contents/files/53704104956.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135835222be3---14104173092.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/mugorasiboxejezuju.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16137f0e756343---1982039540.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/77406754134.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/85360447503.pdfIn PDF document text
    • http://www.buildonhope.org/file/5594791529.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/49472856175.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/zifegekesakesetarorox.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/54281758863.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377c18c6149---18151099180.pdfIn PDF document text
    • https://creativekids.abcedukacji.pl/web/uploads/files/libed.pdfIn PDF document text
    • http://pi-consulting.ch/download/papomawajekivofapadiwaz.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/6524496573.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/41333767438.pdfIn PDF document text
    • https://poganyvolgyi.hu/userfiles/file/xomefewoxuwukuriwakuxon.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/xozelolumijizobi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=mi+tv+remote+not+working+after+pie+updatePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF23 10964 bytes
SHA-256: 9ba274963dd5edaf3c583e3f6db924e2346239ca66856d10c033ef384f6350a7