Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c00a1e0fb10334…

MALICIOUS

PDF

77.3 KB Created: 2021-03-06 06:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d071fd0e925d349f7fb52cb0c8eba119 SHA-1: d8e4700c8e50ac47bc555ce263392de4208d9855 SHA-256: a8c00a1e0fb10334c72ea88570bbf255ee1b3e59f1a5d9d013f9d87274e49fbd
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that mimics a search result for academic answers, a common lure for phishing or malware delivery. While no scripts were directly extracted, the PDF structure and the presence of external URIs suggest an attempt to exploit vulnerabilities or trick the user into navigating to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://kuzutuzo.ru/wix?keyword=strive+for+a+5+ap+statistics+answers+chapter+3
    • https://static.s123-cdn-static.com/uploads/4387706/normal_6000c42641bc7.pdf
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/xaravi.pdf
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/babijujov.pdf
    • http://kofodotig.sportsontheweb.net/is_lord_of_the_flies_suitable_for_a_10_year_old.pdf
    • https://cdn-cms.f-static.net/uploads/4375352/normal_6039d48b0181c.pdf
    • http://pafugiwerokamez.iblogger.org/chrome_offline_terbaru_2018.pdf
    • http://wunanufirum.22web.org/happy_birthday_images_hd_video_song.pdf
    • https://static.s123-cdn-static.com/uploads/4421781/normal_5fc7a705c9497.pdf
    • https://tekaxudifen.weebly.com/uploads/1/3/5/9/135992886/6625508.pdf
    • https://cdn-cms.f-static.net/uploads/4393639/normal_601704cac40e8.pdf
    • https://cdn-cms.f-static.net/uploads/4481662/normal_5fd29d6a6650f.pdf
    • http://jetanevuv.iblogger.org/gugedulomidaterex.pdf
    • http://zutatowatipo.mywebcommunity.org/84938756969.pdf
    • https://wexopusipomela.weebly.com/uploads/1/3/5/3/135313487/sorasizapasum_wanofidas_suzutowipen_bokopulebupa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://watidoterer.epizy.com/run_android_emulator_mac_os.pdf
    • http://wijegasijewen.rf.gd/vevazisatinojos.pdf
    • http://xojorefalez.rf.gd/porsche_owners_club_san_diego.pdf
    • http://wonetone.rf.gd/85868806672.pdf
    • http://lekowezitodog.rf.gd/lexington_county_sc_arrest_reports.pdf
    • http://bokakemipik.epizy.com/43524234096.pdf
    • http://muxolisakij.epizy.com/civilization_iv_colonization_strategy_guide.pdf
    • http://fuwasal.rf.gd/zivetezezojoda.pdf
    • http://wumepudefix.rf.gd/chemistry_unit_12_test_answers.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_off0000eff9.bin
a44e3f1e0c61f3f7389cdcdcb9b924c6d928ebb5d04dd29fe581b12323736456		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF9 5612 bytes
font_01_sfnt_off00010329.bin
a80924f7e78e2aa3743850432091a596191bc25d5fff03f8c2803d58a735a71d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10329 10872 bytes

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