Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a7837331d79a9b…

MALICIOUS

PDF

81.0 KB Created: 2021-03-12 07:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 736614019759cc8b11b21705a0a7678f SHA-1: beba36389484227468c8474dddbfcde0806a303a SHA-256: e3a7837331d79a9b2f6c0354fc4420738a7be93fc1eb81a185cc0ee498b8766d
176 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'SE_ENABLE_LURE' suggest the document is designed to trick users into interacting with malicious content.

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://mezovuduw.ru/123?utm_term=duplicate+sheets+in+excel+vba PDF link annotation
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/20449.pdfIn PDF document text
    • http://sesulup.iblogger.org/how_to_write_a_family_narrative.pdfIn PDF document text
    • https://divetuguwopad.weebly.com/uploads/1/3/0/7/130739619/tarilotiw.pdfIn PDF document text
    • http://xuzobinemipivor.mygamesonline.org/novibotebalek.pdfIn PDF document text
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/2466467.pdfIn PDF document text
    • http://dafitunexen.iblogger.org/toxowifikosazanes.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/towezisarasepezam.pdfIn PDF document text
    • http://fobexugelego.getenjoyment.net/how_to_reset_taylor_digital_food_scale.pdfIn PDF document text
    • https://wupumemugate.weebly.com/uploads/1/3/1/4/131407036/makagegimad-bimedexuk-fubajigo-sofitubapirafek.pdfIn PDF document text
    • https://soferivajateru.weebly.com/uploads/1/3/4/6/134650686/5962327.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/nisoxow/feliliv.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/fogufar.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/34596177272.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/60178880780.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/36670071918.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/astute_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/characteristics_of_autocratic_leadership_style.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/sap_mm_end_user_guide.pdfIn PDF document text
    • http://rojepubaxogo.epizy.com/chhota_bheem_cartoon_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/82634577550.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/annual_return_format_under_companies_act_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/4611979658.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4F 5192 bytes
SHA-256: de99512ccede5106792632dfcee99faffb95d17a21b9ce6ccf5c5e5dfc16f165
font_01_sfnt_off000110ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FF 10940 bytes
SHA-256: 9923ad09cb956c41a39082ea68b206a7878368faf0ba049ec4990608c534f6ad

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