Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8f39e384092b22…

MALICIOUS

PDF

85.8 KB Created: 2021-06-13 16:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b02fb370a7d8190e4c9febce708f8238 SHA-1: 1c158c1c7f7624a8560fcce9a0570e4e4eb91b84 SHA-256: bc8f39e384092b22e14ff11322305e357f48bb63b68c54a94289cda647557f84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/uplcv?utm_term=download+lightroom+mod+latest+version PDF link annotation
    • http://vladjurnalist.ru/archive/file/7264745299.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/h07bh4e1bgmadn68ormqkv4cbo/40381892234.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/41cdf32809bcc5c4166b77966ef2f816/13595891273.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/fc64f3e3b3e2c3b67cdfd6d8546d7baa/jakugavodeb.pdfIn PDF document text
    • http://rotang.net/userfiles/file/98565178796.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/77a4bd9d082d77e6dfde59dd83fb079d/40971565039.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/428cacc95179f15e26016a43cb2b2cdf/84833505591.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/1ev0d1t2a3ihdd22on7agl96jf/20293495989.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/c0df67a2e51bddb17c4e46b9a4655571/kelij.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/2017e942c1bab44c434282222ccf9102/11038207885.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/35294865234.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/e540gnl6hlbg6j0g772frkm113/93620150873.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/6586cfc8311e3721996c2b616238ea3e/valunazasivetewo.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/97739007885.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/8faa294a065b738c295f69a476f4c53f/79083115018.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/95103890690.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/63a354674e27a4ea2e96751c58036101/39526609003.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/dac61fb5687b653627ba599f64b3059b/88486390064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000f6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 5392 bytes
SHA-256: 4bf750749a4bf47f3d6273c437bc7a0241ac024de310bf48155493102625c878
font_01_sfnt_off00010919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10919 13260 bytes
SHA-256: 4124907eada465e97f18ffe0585624779e85a965f063577953ba0a6752120f63
font_02_sfnt_off00013297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13297 16304 bytes
SHA-256: 36298d9b42482ef505b651e9545134b76438dad7e59d1f17d96a2cc3761d4b83

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