Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2f89d8c043073b…

MALICIOUS

PDF

86.2 KB Created: 2021-09-13 00:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5f748466a1c95cc0614078b63af4699e SHA-1: f6636523534f0aa8dd15eb4273d76de781626118 SHA-256: 7d2f89d8c043073b24444e7743d306ce6d7a6fcbce75b67821eb09b6405b92ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are hosted on disposable domains, characteristic of a link farm used for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://cructi.ru/uplcv?utm_term=how+to+remove+notification+bubble+on+android PDF link annotation
    • http://thegioituigiay.net/uploads/files/pirajanozasegujakekejuka.pdfIn PDF document text
    • https://vilnius.cvzona.lt/resources/img/files/kobiro.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/48907175233.pdfIn PDF document text
    • https://doitoutdoorz.com/file/LedDmI98zGD4yW1Y.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/11981543491.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/jexamilife.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e8fb5b60b---fufamikifefupusilamabano.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/73825280862.pdfIn PDF document text
    • http://www.pes.edu.mn/ckfinder/userfiles/files/60063868765.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/naromadubizamodepubodiv.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f56085f9f---49591628453.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/durujiviwo.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/54896771118.pdfIn PDF document text
    • http://teknis.it/userfiles/files/bisolawebupum.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/nomatizeruzupup.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///12776082324.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/97829762719.pdfIn PDF document text
    • http://e-sheremet.com/img/widapurelozulexidatikoxaw.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/35567770642.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/bepevorejewoteragezex.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac8132107b---86250570098.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355166537ea---tolip.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/ligimum.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/21786078845.pdfIn PDF document text
    • 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_off0000eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0E 10852 bytes
SHA-256: 11bde79278a1a372a3127eeea0882164cf1af04510669ac759158e5888fc1bbd
font_01_sfnt_off0001041b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2D 18332 bytes
SHA-256: 7b7f1477d81f9ba718f43410cf76426e0ee5c549d472417431f00bc811c184dd

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