Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d2dfb6aa7b97df…

MALICIOUS

PDF

87.6 KB Created: 2021-03-09 01:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 43ccd1f02f4a5e37998fa65925e588a4 SHA-1: 472dcba26299a1c0b22d0c3cc592f9128b1519cb SHA-256: 46d2dfb6aa7b97dfe75cff48938d57e840359a73b93a81cb24a71b251a76a6af
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with the primary link leading to a suspicious domain ('druttle.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://druttle.ru/wix?keyword=wireless+headphone+mh2001+manuale+d%2527uso PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386084/normal_6009a5359959c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450353/normal_601b7708670ee.pdfIn PDF document text
    • http://appletopshop.ru/social_phobia_inventory9m867.pdfIn PDF document text
    • http://uber-global.com/60715917796boz7j.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/rugalegubazumebixacx72y.pdfIn PDF document text
    • http://presente-top.store/powapixopu8abpx.pdfIn PDF document text
    • http://madamzero.com/7400978160pw7yt.pdfIn PDF document text
    • https://zowimebewira.weebly.com/uploads/1/3/1/6/131606727/7231203.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/8e631f9836.pdfIn PDF document text
    • https://dofenerezi.weebly.com/uploads/1/3/4/4/134446603/2840876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403948/normal_5ff26474b9564.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/english_conversation_lessons_for_adults_grant_taylorjxqol.pdfIn PDF document text
    • http://dalnoboyi.xyz/dsc_pc5010_reset_master_code9c7h9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379987/normal_5ff58d4be9eb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wisuw/atomic_absorption_spectroscopy_experiment_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/back_to_school_coloring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/linker_and_loader_in_c_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/46828421199.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/lal_badshah_full_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/sy_bsc_computer_science_books.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_off000115ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EF 5572 bytes
SHA-256: ee30774dcf8f0b4fd2e0c7ea5e49e0227e1524b1e78d398c29a9bb1c3b79b0c9
font_01_sfnt_off000128cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CC 12404 bytes
SHA-256: ada44b4759db564605989e0f541043363c5eee90c87ec5ffbf1025c260631bf1

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