Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a6b2fa83a60cf5…

MALICIOUS

PDF

80.6 KB Created: 2021-03-17 18:23:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da7acfbe62b5f296a2f3f08f526b9344 SHA-1: 68e5ee854caa679f5ad974e3f02604574fbe440a SHA-256: 50a6b2fa83a60cf584e614513191170ae65da8e0a6b3096cd1d489b0b79b825e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to 'cancer de pulmon causas pdf', likely a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=cancer+de+pulmon+causas+pdf
    • http://nomenowunesazoz.scienceontheweb.net/93444925553.pdf
    • http://rupebakonodeja.iblogger.org/38344789159.pdf
    • https://static.s123-cdn-static.com/uploads/4501993/normal_5ffa3442a44de.pdf
    • https://cdn-cms.f-static.net/uploads/4387031/normal_601c6a1b411d5.pdf
    • http://poguzozod.sportsontheweb.net/vubonanusez.pdf
    • http://lizowaw.scienceontheweb.net/26955493464.pdf
    • http://memiwuv.mygamesonline.org/77995999307.pdf
    • http://zesenadozefut.sportsontheweb.net/what_is_qualitative_research_analysis.pdf
    • http://fesalasan.mygamesonline.org/jivadapukabusoxima.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gupawupigawono/vevugorotuvuxupebudide.pdf
    • https://s3.amazonaws.com/ditiruz/zijopinifakatuxijiretino.pdf
    • https://uploads.strikinglycdn.com/files/e8035d46-9b16-4f19-82a6-ba1b8dc9ad41/41871640351.pdf
    • https://uploads.strikinglycdn.com/files/bf21bf06-8183-4e21-9af7-e7646a0224e8/98808325014.pdf
    • http://pusolegulijased.rf.gd/keviwom.pdf
    • https://uploads.strikinglycdn.com/files/5ab50877-7a3f-4c54-924f-4c86e68aa276/is_1_month_gym_enough.pdf
    • http://dijuforuzukogem.rf.gd/cd4017_circuits.pdf
    • http://futebowa.atwebpages.com/vadisosenedibatomulobitus.pdf
    • http://zogufisuru.epizy.com/84545786022.pdf
    • http://taroveruwidiba.onlinewebshop.net/analise_combinatoria_exercicios_resolvidos_enem.pdf
    • http://tenefotozefuzuw.rf.gd/7693478019.pdf
    • https://s3.amazonaws.com/muxozuvalubi/39818181712.pdf
    • https://s3.amazonaws.com/pukiza/lesobijodem.pdf
    • https://s3.amazonaws.com/rejiner/multinomial_logistic_regression_spss_output_interpretation.pdf
    • http://bowegasobufur.myartsonline.com/article_370_clause_1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://medlineplus.gov/spanish/lungcancer.html
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc14.bin
240f94e575abae5be28cc0b6c124e67fa1fc5fd7b10b2943da44a381d97e722b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC14 5208 bytes
font_01_sfnt_off00010db0.bin
aae01e259318538c4acf51309cac8918babe9bd35f4ca42f7f619558bc39b5ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB0 11676 bytes

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