Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c46c88e5d886a5a…

MALICIOUS

PDF

75.0 KB Created: 2021-07-14 08:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c32da1ba8dff4f89f3f785bfe2ccd194 SHA-1: 0671f7509d7cc026c63718e4b1a9e2ca125dd4cf SHA-256: 0c46c88e5d886a5ab737ea337c9d098d9e901b88b74897fcdbfe9798c9861fb1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/2dc2bf4e4e029e82ebeb7d69abeb14c8/nutumo.pdf In PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/7286107689.pdfIn PDF document text
    • http://franckjuery.com/ckfinder/uploads/files/forekubabaseluwavugir.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160973648256cb---76313546993.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/4b74fd255aa834c95c30a58b4f33e26c/dibagufotasipeg.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/3559274247.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b2f90d89c---kusarevapekatisedufo.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/zamusijibonef.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/vusasavoru.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160726129b98e0---savifamudilegumububolebe.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/33690190234.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/fiwuwivumojesazu.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcdbbc0f59---94654496056.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/96db073db6cc37c1085ce03ff3f61218/42515644393.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/kodobijosowofixuto.pdfIn PDF document text
    • https://aspirans.com/files/file/dekukipomujekadurara.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/mobedipovikotironanub.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b1fb6f8ec7653895fa6761e1c09a5970/wovifukele.pdfIn PDF document text
    • http://deauville.ru/files/file/kagatolej.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc151951757---88358719613.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/59834395796.pdfIn PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/wemibuxorufurezax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pivot+table+sort+by+values+in+selected+columnPDF 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_off0000c3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E6 16084 bytes
SHA-256: df13ae37d1c08e1492a46f5d5593fe2c22adbc3445f799a1cadebc4d784268aa
font_01_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 10952 bytes
SHA-256: 575d64da1a77c440c30a506147b80646f753deea8129e4ec1e68d81bd6085c16
font_02_sfnt_off000106a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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