Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2990206db758e9b…

MALICIOUS

PDF

75.0 KB Created: 2021-03-03 22:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 119007b81ba434ca81032b0cf5f05b7e SHA-1: 7478ac777afe244bbf80eada79a4a0a4595e5a7c SHA-256: d2990206db758e9bb8ec2c610586473b326e08a28295848f99877483eea506aa
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a link farm heuristic firing, suggesting an attempt to drive traffic to various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics point towards malicious redirection. The presence of multiple unknown reputation URLs reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=sunbeam+heated+blanket+keeps+flashing+red PDF link annotation
    • https://cdn.sqhk.co/folikulezig/j3Qgegf/83865344786.pdfIn PDF document text
    • https://regutipedazuvi.weebly.com/uploads/1/3/1/0/131071249/1430ca2b2d31.pdfIn PDF document text
    • http://sweetygirl.club/18309348842oadyt.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/jhifRje/15564152738.pdfIn PDF document text
    • https://nalimaxepizof.weebly.com/uploads/1/3/4/6/134662907/8a5140920bb.pdfIn PDF document text
    • http://profaudit32.ru/fundamentos_de_fisica_blattqeh9m.pdfIn PDF document text
    • https://mitenebomowal.weebly.com/uploads/1/3/0/7/130775142/toginu.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/hegfGaI/tamil_voice_typing_keyboard_app_download.pdfIn PDF document text
    • http://xigirirata.22web.org/journal_citation_reports_2015_impact_factor.pdfIn PDF document text
    • http://buboripixorezu.iblogger.org/81693816922.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/oXgchfL/xixovobut.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/zolerazowubow/dusus.pdfIn PDF document text
    • http://jidaxel.rf.gd/fokoxader.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/wuvojo.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/medical_fitness_certificate_format_for_maternity_leave.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/kefka_s_tower_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/idsa_cap_guidelines_pediatric.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/curriculum_design_document_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0000e795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 5764 bytes
SHA-256: 3b7296eec3fa1586ca5bddfb86f91202c8f0ad7e8d41a3abd8640d35b5997573
font_02_sfnt_off0000fb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB01 10344 bytes
SHA-256: 9e1734bd80f8e580a2b8432cb5d9440cf9432fb17088f19543fbadfb5a2f12ae

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