Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa936065242f115…

MALICIOUS

PDF

72.7 KB Created: 2021-03-17 04:32:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 635dd6cd565b9546639ac106404a04ad SHA-1: b49ba6747591a6a0c4535bbe0f4906c15a51aab7 SHA-256: 9fa936065242f1151dbc94c27a0f16d454c17e8655beef58056befc7793d22d2
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wix?keyword=rain+bird+esp+6tm+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384035/normal_60167b9b40a6a.pdfIn PDF document text
    • https://jevefelenop.weebly.com/uploads/1/3/0/7/130775498/rugizujamovovup.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/f194hci/gifusuzinunolivitaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421199/normal_5fe73aba8bbf4.pdfIn PDF document text
    • https://dokivubugu.weebly.com/uploads/1/3/4/6/134688884/1004266.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/09fcb94ba87.pdfIn PDF document text
    • https://cdn.sqhk.co/givujelised/fgjieOT/71774394707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402000/normal_5fd628c088794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_60183bf41ccac.pdfIn PDF document text
    • http://sawumivulopajud.22web.org/29729425351.pdfIn PDF document text
    • https://zazigiwozaka.weebly.com/uploads/1/3/2/6/132681333/6658016.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/bibjjf2/switch_controller_tops.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476941/normal_5febf73c56e28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_601f62c67d1ec.pdfIn PDF document text
    • https://zobojosapez.weebly.com/uploads/1/3/1/4/131483592/tegalinanesep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477167/normal_5ff7ba0e9df94.pdfIn PDF document text
    • https://kazerefe.weebly.com/uploads/1/3/1/0/131070627/66c869ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5fd1c7431d3e2.pdfIn PDF document text
    • https://tufasibapot.weebly.com/uploads/1/3/4/7/134716176/8104316.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuvebiz.rf.gd/29411949982.pdfIn PDF document text
    • http://dirunexodov.rf.gd/intermediary_guidelines_amendment_rules_2018.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF61 5404 bytes
SHA-256: 50955f29302131cc722ef531a47fa5177954340c7d4eda55dafd920189006194
font_01_sfnt_off0000f1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 10520 bytes
SHA-256: 7a5c5dbafe5edea75d67c7d22887c9a9b4f133604348dbb5a0ae1043fe9e620e

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