Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e474c001ca4a15…

MALICIOUS

PDF

75.3 KB Created: 2021-03-10 22:25:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beabcd09a23e75a4e326adc210bb39a8 SHA-1: 2853120a0f88a57b0e9f65bca269d10629e0c198 SHA-256: c8e474c001ca4a153767bb15422d617c4ba32c7b7e6244d769363495d04ff570
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an embedded external URI, specifically 'https://nipisod.ru/123?utm_term=doctor+note+template+with+signature'. This URL is presented in the context of a doctor's note template, suggesting a phishing or social engineering attempt to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/123?utm_term=doctor+note+template+with+signature
    • https://gimepokik.weebly.com/uploads/1/3/1/6/131636980/didumuruxilatog-sezupex.pdf
    • http://tipofeliluget.medianewsonline.com/95137258250.pdf
    • http://kugewezebuvigiw.mygamesonline.org/2003_honda_accord_door_parts_diagram.pdf
    • http://nokasosozigof.mypressonline.com/fagigizupot.pdf
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/bizasopupawa-webavukopuxafox-solexa.pdf
    • http://xedeporib.medianewsonline.com/brookstone_wireless_speaker_recall.pdf
    • https://fekolulowezomo.weebly.com/uploads/1/3/4/5/134593542/pijuselelego-dovozaxur-xusiboti-nabigemojevebo.pdf
    • http://mobufuwiwid.medianewsonline.com/kuxifide.pdf
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/pijato_nufewigip_vijudula.pdf
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/4856724.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8939cac1-e82a-47f1-8852-c23ecfdd7aaa/summary_of_rousseau_social_contract_theory.pdf
    • https://s3.amazonaws.com/jesidofefe/gezomafigogepivuxaxub.pdf
    • http://bufijonewufo.onlinewebshop.net/67703261553.pdf
    • https://s3.amazonaws.com/bejexe/56004323095.pdf
    • https://s3.amazonaws.com/risalenefazozo/disapekonovowularo.pdf
    • http://tuwutexo.onlinewebshop.net/zefifaz.pdf
    • https://uploads.strikinglycdn.com/files/62ad792c-86aa-4beb-ad46-eacd7a770cf5/what_words_begin_with_fuc.pdf
    • https://s3.amazonaws.com/vavale/50738126010.pdf
    • https://uploads.strikinglycdn.com/files/601abbde-4925-42d2-b87e-d5889e15f1b3/braun_oral-b_toothbrush_heads_sensitive.pdf
    • https://uploads.strikinglycdn.com/files/100f0c54-8fdb-4da6-a7b1-93b136b5d7e8/cuanto_mide_un_bebe_de_1_ao_y_5_meses.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_off0000ea13.bin
44ade80c28859c7d60ef54a7a0d76c960c7ced019cd7d3bf55e655f39b022f6b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 5440 bytes
font_01_sfnt_off0000fc7b.bin
2637223fac7c1e8fbbd84ead784de3fa0252f0e7924ea7d777ea7b1c14a84e86
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7B 10316 bytes