Malicious PDF — malware analysis report

Static analysis result for SHA-256 e978af6728aa40e2…

MALICIOUS

PDF

270.9 KB Created: 2021-04-07 20:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ca54a2100f0399e95b4ec1753f729465 SHA-1: 2c86d25c0189b35051c3f7e1c6b4bc219ce3e543 SHA-256: e978af6728aa40e2c26b60fe7553de26e551a0549c150cfda4f33f0930923d00
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'baarspo.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to trick users into clicking a link, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=vocabulary+building+book+pdf PDF link annotation
    • http://rugegav.mywebcommunity.org/jakoronadabofonefuvujeto.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/4803579345.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/2hcKgj0/sudakobomixeluv.pdfIn PDF document text
    • http://vomoliba.scienceontheweb.net/porcentaje_de_anemia_en_el_peru_2020.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/57685738022.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/gSfWieZ/20080480538.pdfIn PDF document text
    • http://zumofujewor.iblogger.org/add_text_to_video_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoposuj/ekQ7he5/online_marketing_courses_for_beginners.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/piguxilegilamusizexunemoz.pdfIn PDF document text
    • https://cdn.sqhk.co/nozesinipi/jWgdiaq/rexefadujexafisepofazat.pdfIn PDF document text
    • http://sasegotib.medianewsonline.com/angle_relationships_review_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/ibjhihL/boxer_interactive_a._i._robot_toy_review.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/free_loan_agreement_template.pdfIn PDF document text
    • http://setomomenoku.22web.org/protein_extraction_lab_report.pdfIn PDF document text
    • http://bukatinanebon.22web.org/94241682170.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kesekerezox.epizy.com/rorurunapawolelulavodino.pdfIn PDF document text
    • http://munomofeduvuwe.rf.gd/making_your_own_wing_chun_dummy.pdfIn PDF document text
    • http://lodibepaw.epizy.com/36009366328.pdfIn PDF document text
    • http://lenigabemez.epizy.com/urdu_autobiography_books.pdfIn PDF document text
    • http://nisifibuvez.epizy.com/38327531227.pdfIn PDF document text
    • http://xeketak.epizy.com/a_midsummer_nights_dream_sparknotes_act_5.pdfIn PDF document text
    • http://disoluje.myartsonline.com/beats_solo_pro_noise_cancelling_black_friday.pdfIn PDF document text
    • http://fusopub.rf.gd/how_to_write_30_minutes_in_decimal_form.pdfIn PDF document text
    • http://lifobem.myartsonline.com/vumuvepupi.pdfIn PDF document text
    • http://fipiwafupogo.epizy.com/free_figure_drawing_books.pdfIn PDF document text
    • http://gonidiwofove.epizy.com/12455471469.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/93925406567.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001bff6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BFF6 192608 bytes
SHA-256: 6fdcd629082702d9c7e46159b6ddea5817acb543c85d5e93b9b81abfe7eb85ae
font_01_sfnt_off0003f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F4D2 5416 bytes
SHA-256: e445cacaac9554a8c8bd8346672aa418dfb4e9fd579e267656d9a8943e6cbfe2
font_02_sfnt_off00040759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40759 10948 bytes
SHA-256: 934ae07a9e5c56531edb53d855e6b6d401382abca5979288de36b9bdddb41e59

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