Malicious PDF — malware analysis report

Static analysis result for SHA-256 195157f1eaf907d2…

MALICIOUS

PDF

69.6 KB Created: 2021-09-27 14:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d28d72ce4fe986015ec5ee6c380af2d7 SHA-1: 7e93c385cd12bab29cf00c6a9ce01f1fc9e38d2a SHA-256: 195157f1eaf907d256532791580564a0c7d6b8df05557125a003a67b7e06248f
196 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or trojan distribution. It contains a link farm pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute further malicious content. The presence of 'utm_term' in one of the URLs indicates a potential tracking mechanism for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 https://duocvinhkim.com/userfiles/file/54288523502.pdf In PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/kobilejeg.pdfIn PDF document text
    • http://www.toptehnik.si/images/19590245102.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/34316182948.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/89425877327.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/misemox.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/gitumobijekaronanifagad.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/nuxesaxajekuna.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614ceb5f3246d---10461502040.pdfIn PDF document text
    • http://lishasurgical.in/ckeditor/ckfinder/userfiles/files/genowe.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/zafonefezoj.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/vevuramajizadem.pdfIn PDF document text
    • http://e-hematologica.pl/users/file/wakelixawozulakufeva.pdfIn PDF document text
    • http://actinq.nl/upload/file/61061354748.pdfIn macro / runtime command snippet
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/lunozikoxusewevomeguzon.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/nagig.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/54828853875.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161465f600594b---40171268092.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/simabofoziduvutataj.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150dda1a9ddb---nagajuz.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/sujano.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/bada8725f50f52b190814ab6aab4f50c/nituwenidoburakew.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/3838101154.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/gapipuk.pdfIn PDF document text
    • http://e-hematologiIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=avee+player+template+download+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_off0000b235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB235 10632 bytes
SHA-256: a71ea5d882cadc616367358d2f3029084e4ad31e47983dc5f0aa69c3c921518f
font_01_sfnt_off0000ca9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9B 14964 bytes
SHA-256: e82903e252694ec1342b9ea82daa63026f9258b00401e4af8436e042ecb1aa6d
font_02_sfnt_off0000f06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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