Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5eaa06401d5651…

MALICIOUS

PDF

78.1 KB Created: 2021-09-19 19:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 04b2a5e14305fbe24ecd120dccf7423e SHA-1: 875093a6d0996eced136b9424d7a4a783796a669 SHA-256: 4c5eaa06401d56512bde862377a9045ff660f8295eae1f9e0e97eef509ea958f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable or compromised domains, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier strongly suggest malicious intent. The presence of multiple PDF link farm heuristics further supports the conclusion that this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8140

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
  • 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://azco.friend-match.com/upload/files/lipusigute.pdf In PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/tajijegagufu.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/rexarateb.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e761202d0e---33205909454.pdfIn PDF document text
    • http://fruitvita.com/files/files/seneziwagamapakup.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/gixezikubi.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/8ca0a6217c30e5caa42190d3c304eb02/jagatevujixifug.pdfIn PDF document text
    • http://ser-buk.com/userfiles/file/13958440939.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/tinav.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/1379753196.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/68982935467.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/45191135406.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/wulisumifu.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/gamamaniforetafalava.pdfIn PDF document text
    • http://9275522-travel.com/userfiles/file/pedikujera.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/magozo.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/43180677550.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4daa7c206---demisojavuzidimet.pdfIn PDF document text
    • http://sydjpg.com/images/upload/file/20210914_002705_156.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/44818964602.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/kujigewagiriz.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/74494267359.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=android+set+sd+card+as+internal+storagePDF link annotation
    • 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_off0000de9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9B 17648 bytes
SHA-256: 533b85c7964bbba6ffb780d5039be46b87179f68a4549be122a635ac0dd8c9b6
font_01_sfnt_off00010c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12485 10524 bytes
SHA-256: b3be93194ad35f627c991186f2c07000651676d61366b9983f9c8384e64741fb

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