Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9024c068d91faa…

MALICIOUS

PDF

79.2 KB Created: 2021-09-15 19:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 714422d903e7eefc3a5fdf0891c91ffd SHA-1: 610400bcc8ad0d345896fac3efcb367753d1e0a2 SHA-256: 8b9024c068d91faa76cec7303c2c85beb05292629b8811eaea1c9c1c43d0d2b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of URLs pointing to various domains, many of which appear to be disposable or compromised hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a link farm intended to distribute malicious content or phish users. The embedded JavaScript, while not explicitly detailed, is a common vector for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://progfin.pl/userfiles/file/92156962203.pdf In PDF document text
    • https://estoniapools.com/contents/files/77448041191.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/84201133509.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/figixaseto.pdfIn PDF document text
    • https://autoskola-scp.com/files/54941184669.pdfIn PDF document text
    • https://035620126.tw/upload/greenkitchen/files/gusojisutu.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/q8pern2ipr2ggsq4ljnm5pp8i1/64893497392.pdfIn PDF document text
    • http://sbkf.org/files/files/44519704383.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/lumatezaz.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/rijet.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/gitufadijimofupeluzumo.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/10729838815.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/34312510682.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/sosuxixewotaxitej.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/11827319677.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/jedazogaxomev.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/24133580884.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134444b9c0e2---debolesezegafogenozut.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/36217354079.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/lkurrniaujcr46jh234l9mao27/gerolefafixusidebaperoxaw.pdfIn PDF document text
    • http://praguetransfer.com/files/file/xolenofik.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/89620556891.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/64738848257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=download+videos+instagram+reelsPDF 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_off0000d08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08F 17816 bytes
SHA-256: 415a56934f99c11b5befea9a2ff39adaf19fe12af593a65121a63a3ac4cb9fee
font_01_sfnt_off0000fe65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE65 10744 bytes
SHA-256: 57ace2410e0b22b259afbd3f9a73fc3b72780b58036c2c6b199cc713bb7c773a
font_02_sfnt_off000116ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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