Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47c5a6d3d6bdd2f…

MALICIOUS

PDF

76.9 KB Created: 2021-04-22 18:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26d981a54ef5e99ebbed1e135a29759d SHA-1: 118ef36d74242bb3c4e7419c9e62650810e8a497 SHA-256: a47c5a6d3d6bdd2f266ff5f8533004e074b0b5dc86985debf945c251b139f1dd
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=verbos+regulares+en+ingles+concepto+y+ejemplos
    • http://matawobedopikam.mywebcommunity.org/83957106402.pdf
    • https://pexasuwen.weebly.com/uploads/1/3/4/5/134593650/juteruke_notoridivifevi.pdf
    • http://lamejix.scienceontheweb.net/toward_a_psychology_of_being_download.pdf
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/regas-xulemewefe-samikogikidobok.pdf
    • http://mumijivamivaxij.medianewsonline.com/types_of_analytical_balance.pdf
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/wewuvozubosoku_xazepolenamul_jemawo_patojax.pdf
    • http://serovakarara.mygamesonline.org/bob_evans_nutrition_everything_breakfast.pdf
    • https://gavaxavudo.weebly.com/uploads/1/3/4/5/134581950/piregawuduwomi_ridefudi_xubilukodurad_gotedejoluve.pdf
    • http://mazejofeg.mygamesonline.org/materiales_dentales_historia.pdf
    • http://sukutoxuwurif.mywebcommunity.org/aw_tozer_devotional_app.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://putojoner.rf.gd/12197554115.pdf
    • https://s3.amazonaws.com/jenagubadopi/sidanigofidolavaleta.pdf
    • http://zudovub.epizy.com/54095222345.pdf
    • http://namutogenasokab.epizy.com/debazikoxokegen.pdf
    • https://s3.amazonaws.com/tanikanaw/keseledakitenelukuvof.pdf
    • https://s3.amazonaws.com/pibabopuduj/1080113666.pdf
    • https://s3.amazonaws.com/jifedefujodu/19644890748.pdf
    • https://s3.amazonaws.com/varolexexus/how_to_install_z-flashing_on_t1-11_siding.pdf
    • https://s3.amazonaws.com/genijusemu/river_cafe_wedding_cost_per_person.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000eadd.bin
968e6df4ce077490e91a77432ca5e8739f8cdc39e4a4c4a6271f8c540c2b20dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 5536 bytes
font_01_sfnt_off0000fdaa.bin
07cfed5af2e38a4c81b9b57bb746107f4ba15870516fa78c5e1a9f3436895433
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAA 11972 bytes