Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f2fd3e989d8d8d…

MALICIOUS

PDF

70.3 KB Created: 2021-07-24 21:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dfb5eebddaae39f2e2593ed5e1d43031 SHA-1: 76a5fae338322331efef0366282a9c8fbf5b812d SHA-256: 25f2fd3e989d8d8d468e1731ff9d21dae213b0598aa2fa13a5a6f229544d4c3f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous links pointing to compromised WordPress upload directories. These links likely serve as a distribution mechanism for further malicious content, characteristic of phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6237

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 https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/avl8s5uuq9afte8vrbhbav5o84/22485008997.pdf In PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160befaa38bd8e---74185640962.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c63f9a60e---bolupesojodutufasejugovuw.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1424258f35---86266818782.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076508e641b2---9205726759.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/19398683659.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/jkbs49i06d988085051jf6uq4n/85500124717.pdfIn PDF document text
    • http://come2menorca.com/images/file/79424425093.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2013d6211---tefawosuwikuwovasuwo.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/28584664821.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/xesoxufetedajujupim.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/92469be6930559312b790bec8ede24a5/3595152969.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/49724732950.pdfIn PDF document text
    • https://luminex.pl/upload/file/29880487109.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5d92454e9deb5ddb42602b74536e55c2/75508156445.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7bd55f1fa---5925956928.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/3839301825.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/71626225025.pdfIn PDF document text
    • https://airshow-bg.com/file/93414527123.pdfIn PDF document text
    • https://genericdiabeticteststrips.com/userfiles/files/doxewimosuzibeme.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/026c131db0ba620e13bb41ecb0b0239d/salilefefanavagaxelu.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b7f23950e---giguxadabufo.pdfIn PDF document text
    • https://bdcomunicazione.it/file/zolivevigevirogija.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=jonathan+nolan+memento+mori+short+storyPDF 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_off0000cfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EB 15760 bytes
SHA-256: ef798f3b9f91daae80fc5a418e20dc16b66d3c40729dcdfd37b69bef6e1973bb

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