Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6198129a2884ed1…

MALICIOUS

PDF

75.7 KB Created: 2021-09-01 18:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d52d7d33be8cdb993e30848368e97064 SHA-1: ad98471dff552c7849dfc248f88401fe8f36f1c2 SHA-256: b6198129a2884ed1b2ca09ff749f1616816b74cd6d7d942ad08823fa0d04104a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external websites, some of which are hosted on compromised CMS uploads. The primary goal appears to be directing users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kbinteriery.cz/userfiles/file/22166330681.pdf In PDF document text
    • http://komodovo.ru/upload_picture/depuvufixawu.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a253e448db3---31642189781.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/jogebemu.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/90410728415.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/suvekigobogazabusi.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/32affe3bfce4d0633014def0a2576103/zovof.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/83718081458.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f63d69e90f---98504766939.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddbc4c553f---wifilasuzakow.pdfIn PDF document text
    • https://luminex.pl/upload/file/nivutepud.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/vugukegedisizopilesudivot.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4ae64ac64---zubijafoxumivajud.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/je5or118n7hdt4stup8bfm7jtn/32952285465.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a077baba06---34911827333.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/ninov.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/6068136d4d3cf4b9c2fbd6c04580cbd9/31897828530.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7fe4d4c46---26020919130.pdfIn PDF document text
    • http://rkdestate.com/userfiles/file/75054494423.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16128e2625f49d---zeruponupidanopigib.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/mijadutujuwiwad.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/nutol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+force+turn+off+iphone+6PDF 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_off0000c4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DD 16984 bytes
SHA-256: 5e0394bfa7b318b3c32e5d32709163883211aab73d3d7d80773cf2cea66f4554
font_01_sfnt_off0000f0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 10548 bytes
SHA-256: 7af46e7e726fe8aa705f0424c35dfc8e7b28bdd97d3571c4ec3de6691e4a983e
font_02_sfnt_off000108e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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