Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9941c262047e8b…

MALICIOUS

PDF

88.0 KB Created: 2021-03-20 05:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ca982a721998a97114dc8e4066f8a8d SHA-1: 15115f2c478776325f84f64c61c086e035aafeb3 SHA-256: 9c9941c262047e8b61d53d45bf19aa3ec34387e607d965955f8273de6620e336
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, indicating a high likelihood of malicious intent. The document body, though partially obfuscated, contains a URL that appears to be a lure related to nursing school interviews. This URL, 'https://vilenefex.ru/strik?utm_term=how+do+i+prepare+for+a+nursing+school+interview', is the primary indicator of a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=how+do+i+prepare+for+a+nursing+school+interview
    • https://cdn-cms.f-static.net/uploads/4448713/normal_60417dde6b628.pdf
    • https://cdn-cms.f-static.net/uploads/4501214/normal_600f1fa82e7f0.pdf
    • https://cdn-cms.f-static.net/uploads/4417813/normal_5fd6c543d8339.pdf
    • https://cdn-cms.f-static.net/uploads/4489598/normal_5fd62d3907062.pdf
    • https://mosawowogan.weebly.com/uploads/1/3/4/5/134511341/5166976.pdf
    • http://1xbet-football.fun/294931057364p93d.pdf
    • https://juwudusufutibor.weebly.com/uploads/1/3/0/8/130873872/8947193.pdf
    • https://kotezoxeruv.weebly.com/uploads/1/3/5/3/135345651/juxekizonokixow.pdf
    • http://rafale.store/wimarebazivoduxifajthb4e.pdf
    • https://static.s123-cdn-static.com/uploads/4453134/normal_5fed5dc5a51d4.pdf
    • http://meetsalle.xyz/masozudanr83rm.pdf
    • http://biotringel.shop/ampli_peavey_vypyr_15_wkoh4t.pdf
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5fdaaaad42d03.pdf
    • https://xifexovajebim.weebly.com/uploads/1/3/0/7/130740184/2268253.pdf
    • http://copriyghtconfirmed.com/what_is_fit_for_life_diet_plan88jal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kofufinaniba.rf.gd/22887397257.pdf
    • https://uploads.strikinglycdn.com/files/e27bae0f-2c5c-4aeb-983b-69210162d206/how_to_be_a_graphic_designer_without_losing_your_soul_adrian_shaughnessy.pdf
    • http://dabevejef.rf.gd/hollywood_movie_tamil_dubbed_tamilrockers.pdf
    • https://uploads.strikinglycdn.com/files/943100e4-11a9-49bf-941c-00543932ae35/saxipugidopabesikirage.pdf
    • https://uploads.strikinglycdn.com/files/2b952f60-cb50-41d1-8795-6482cbee714c/ashtalakshmi_stotram_telugu_lyrics.pdf
    • http://sugototuvomek.rf.gd/47400247881.pdf
    • http://lipuwetaw.epizy.com/rrb_je_mechanical_old_papers.pdf
    • https://uploads.strikinglycdn.com/files/03b55091-6900-4b2c-b3ac-1a4e179bbd48/wuxuvezorazunazefamazuku.pdf
    • https://uploads.strikinglycdn.com/files/6436bc31-8fb9-4d8b-b48d-7abdbd5bb73e/lolixiradanawotabagodu.pdf
    • http://wuxekijonudi.epizy.com/kelid.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_off00011970.bin
ec0f5e33edf51c09a0431aa169dacc14da1a7ec07d8e5fcd2de25dd5779b269e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11970 5532 bytes
font_01_sfnt_off00012c59.bin
14b4dcbc6208a14722a517308fe509375fe8606e9c8ac872e950d1936de60b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C59 11088 bytes

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