Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2c1d0627746fce…

MALICIOUS

PDF

100.1 KB Created: 2021-10-06 17:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 44c234194c3bf4c893ab705fff350221 SHA-1: 201c6538baefe9ee5d5d0757af78c889f790e9a9 SHA-256: fc2c1d0627746fcec87c2a6af16fab7c24d6c2cb7b690f9a439537f76b29eed9
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload directories and disposable hosting. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://garglob.ru/uplcv?utm_term=isopropyl+alcohol+water+solubility PDF link annotation
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614630e69bfc1---jivededasufofij.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/161418d2d31d4e---59820877877.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/fowupedawera.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/10037683596.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/92985462245.pdfIn PDF document text
    • http://aven.su/userfiles/file/60916773163.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/33238422943.pdfIn PDF document text
    • https://basisnomor.com/contents/files/nitidaf.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/12085637692.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/xunejozek.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe9m44i4eva90eoi3ma7i3l3nr/xokolapoxog.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/45348705859.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/59039312768.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/75703395060.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155a14c0513c---fedapojobatufesiletutuziz.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/78621180079.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/6854820259.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/161441364.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/vaviseg.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/doguwegesowagorib.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/bugomasafowi.pdfIn PDF document text
    • http://miyisz.com/mingyi/images/userfiles/file/57666100657.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16153d4bfb9eef---rokemavasevoz.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/98470673543.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_off0001191e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191E 10760 bytes
SHA-256: d76d779ee5d9f0a970df89d6a3dceadb499bd1d48be6e94326e5cacfa7e3cd81
font_01_sfnt_off000131e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000149f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149F9 21824 bytes
SHA-256: 2247e040919ea23ab673eaef3ef1b6b9c8467ecab39787fb64a979523baec027

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