Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8be4418c57c339…

MALICIOUS

PDF

80.4 KB Created: 2021-09-17 12:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 46a65409c782ec5b9a5a1a8cada9ec4e SHA-1: f71555d7c4a20022dac13138576f94546fcfa52d SHA-256: 0c8be4418c57c33978d4b9d50523dfa62dfa3f512883f20d354a29a25bac073a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised CMS upload storage or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or download of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://oniceh.ru/uplcv?utm_term=farm+heroes+saga+update+for+android PDF link annotation
    • http://thuocamakong.net/userfiles/image/file/tozematufomosuguvitif.pdfIn PDF document text
    • http://web5gstore.com/Files/files/dapifeket.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/sorifutudolenumudoribajur.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/turukowifuresorunove.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/97987741720.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/elooau4kpongd8noaeck541dn7/juxinilexativonon.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613600ceee4e4---bejenobu.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/vobev.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/5c3794f7a5f34b9138128041c829d0a3/varamunu.pdfIn PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/10369811278.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/jobeku.pdfIn PDF document text
    • http://elsped.hu/files/file/35515583901.pdfIn PDF document text
    • https://chineseclothingonline.com/File/lupelurin.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/fifikanoj.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/12495300708.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/32573672613.pdfIn PDF document text
    • http://surtek.biz/image/files/20150330_101405.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9797ce6cc---watawegifopoxim.pdfIn PDF document text
    • http://alvitraders.com/files/67780973757.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/96596167476.pdfIn PDF document text
    • http://air-ned.com/uploads/files/55960802310.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442759917be---12626455081.pdfIn PDF document text
    • https://samajsutra.com/userfiles/files/66030410999.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/66928909278.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_off0000d104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD104 19204 bytes
SHA-256: 6dc3c11bbdb6d620c4cdf1b47999d299de73ff68d1b67e9f965d3bc9226222fa
font_01_sfnt_off000102a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 10976 bytes
SHA-256: eb00d653c566c2edbd2a23f68471fc8d58b0eaffe7d47865ce3b50f31dcaae2b
font_02_sfnt_off00011bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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