Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d3ba090ff322e6…

MALICIOUS

PDF

80.7 KB Created: 2021-09-06 13:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7557bd6ef88f769123cbf32458a3282a SHA-1: d4cf36d0fb5a875a5c8481c1729427889e4df650 SHA-256: d1d3ba090ff322e6ac5df2ca193c296b300d3361b96ca37c1ef5f109cfe93c4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised websites or disposable domains, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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
  • 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://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608086a6bacbe---10134580572.pdf In PDF document text
    • http://anatolianlgs.com/userfiles/file/visupexumobitixabivesegen.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f082425943d---wimatefimofe.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb83322b2b---lifodutigalebubasiro.pdfIn PDF document text
    • http://come2menorca.com/images/file/79067659037.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/78521110154.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/77364575056.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/2012dc86ad6b3a175d1d19161009f3ac/jijiti.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/zogewanizikaxanegive.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/wesopaw.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/61274539250.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6280da5c9---nulovokipabigiko.pdfIn PDF document text
    • http://petersonhigh.com/clients/33446/File/68396421325.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f6d4adc5300---mosenefipuve.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202108/file/19507519087.pdfIn PDF document text
    • http://fitviewer.biz/files/file/70448066863.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/329a64e00ba4b8f01db7285b8fdee8e2/12213139943.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/60e12f75bf92b.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f1c78c47b77---26182532740.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/wapigifokadalatoxole.pdfIn PDF document text
    • http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/gabosuwejejazininetitab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=delete+worksheet+in+excel+vbaPDF 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_off0000d4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C1 10812 bytes
SHA-256: 3c37374e73a75e1032b59955c57163cf372dc24aff6cb7993a7f891adf729c41
font_01_sfnt_off0000edc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 18112 bytes
SHA-256: 255d199346dd21d3df99ea57b4fb7fe027af3c5933df207e3370f117ce2b5aed

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