Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe6c068d6122e44…

MALICIOUS

PDF

81.5 KB Created: 2021-09-13 06:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9d68f3430f802eac0db2370cd129f46c SHA-1: 589d2e65d93231ce339516fd057ed5543a99c1f7 SHA-256: dfe6c068d6122e4412909a1bbc43b3d5dd0587162cbef0d7811e200466e45971
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://giritrademark.com/content_files/files/pefiw.pdf In PDF document text
    • http://plncse.hu/php_data/file/kijidilu.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/lobajolimesedasewarasuren.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/9209272842.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/68376353928.pdfIn PDF document text
    • http://qfuse.it/images/uploaded_files/ckfinder/files/1631432250_7bd353a758.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/8733973290.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/np14gcc2sm89u759ubfpgbi9ah/sixuzikikoka.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16137951ea3dcb---vijusagedem.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/bawiniwawufupene.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/jifaridesa.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/rakapu.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/xowimegasuwawosonetozoz.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/56960164331.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/sufabutema.pdfIn PDF document text
    • http://santabruna.cl/upload/file/53253126374.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/698642328.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/6188580956.pdfIn PDF document text
    • http://efrex.cz/files/file/sagatewutelanikodu.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/67155924190.pdfIn PDF document text
    • http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/ruwunavifavevevozo.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/mabigeviwam.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9f059c7f4e6695d022e29c15301aa94c/5806616375.pdfIn PDF document text
    • http://cnex.cc/images/blog/file/dijup.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/xezepesetidat.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210911050906.pdfIn PDF document text
    • http://khiensa.com/UserFiles/File/lodavewukakoxoxesamonoku.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/filixip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=alarma+en+androidPDF 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_off0000dbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC6 10124 bytes
SHA-256: 084dcb82718837c19b9394c7c81c9add4cb8377f127e9accf956809d209f7421
font_01_sfnt_off0000f23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23E 18344 bytes
SHA-256: 4cf87b6b1e32ac2d139b2fb9cc258cad943ac4a58ed576ea5dfcc54924c8f7bc
font_02_sfnt_off000120be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1