Malicious PDF — malware analysis report

Static analysis result for SHA-256 422fdc2ddfeb0844…

MALICIOUS

PDF

85.8 KB Created: 2021-09-07 12:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 14aca0755b06fabd20bbf73f2371bcf5 SHA-1: 9804a0deddf02ce3fa4176cdd21a99044e422294 SHA-256: 422fdc2ddfeb0844a8197abadeae0c04d1ef1dd5636d542ff0fd7da6acbf1157
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites. The presence of numerous unknown URLs, many hosted on disposable domains or compromised CMS uploads, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://girisimcilikproje.com/resimler/files/mezesumupezuvusig.pdf In PDF document text
    • http://csc021.com/userfiles/file/20210614063756_7ib56m.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/45036145836.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/2890740cb6ffa4f9f9e49373ad47b97d/pikuvido.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/67409119186.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118c0c02cf20---56329960368.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/xevajijuta.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/riwupefovirepan.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/161238b4bf20a4---67007948099.pdfIn PDF document text
    • http://godswaynehemiahmbc.com/clients/878002/File/dopowiseke.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/6971d78156db395ad67d8107ab8d0e8f/fazozepobuzus.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a4febd681---76956280151.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/35743334316.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/16815610300.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/41410769527.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/dbaf0fd9b781e26caa3428018bfa97f7/vebosibevujufanofal.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/83298893848.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/df80620011ab34c6aaf7ca718927fe31/dozowawipowelixujusor.pdfIn PDF document text
    • http://jaatkinson.com/userimages/baziwotugopufebi.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/ruwixufevuriwowovutowonox.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fcfe19899---jawepud.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/a4d34546e7c4decd6adac5a5c528cd07/bovafisufano.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/wujokuvadijefoxibuxururuv.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/41860725206.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a644e5e8e9c---87773896074.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/lumimiduzepikimederoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=benq+el2870u+user+manualPDF 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_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 17888 bytes
SHA-256: 8f163d7d29a52b62d4f3b47ed3e05915644b3372401a13a155d24e1005005612
font_02_sfnt_off00013085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13085 10760 bytes
SHA-256: e1ff17ef433189624e983657f5b5a29184af8f9e01dd99ad62fde25db89a27c2