Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3901a36a5abac36…

MALICIOUS

PDF

71.8 KB Created: 2021-02-17 00:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ce36743cd9371328121575bee302ed41 SHA-1: 5a7845c27479b77e4ca5580295c19a39360967ab SHA-256: a3901a36a5abac36c628abd8f3e4ee16a357461db19bbb938be90a0985d3f79e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site or download a payload. The document body, though partially garbled, suggests a technical or scientific topic, which is a common lure for phishing attacks.

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://jacksth.ru/aws?utm_term=reacci%25C3%25B3n+de+combusti%25C3%25B3n+del+butano+balanceada PDF link annotation
    • https://cdn.sqhk.co/bivuwusim/iefid1v/smash_diy_slime_fidget_slimy_mod_apk.pdfIn PDF document text
    • http://dompodklyuch.com/vigakijexudilevu6sakp.pdfIn PDF document text
    • http://rubeatyshop.xyz/pudabizarurasaxofireko9zo1p.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/eSgjxT7/wejuvatomutarevezuxuwedaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469824/normal_5fcdc44f108e2.pdfIn PDF document text
    • http://teren.fun/garmin_gpsmap_64x_handheld_gpssumme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475219/normal_601832ef5f084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_6019753d2dd72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385213/normal_5fc98af342f61.pdfIn PDF document text
    • http://huseyincanx.com/xifatonotifu2t1yy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimogotewebi.epizy.com/autocad_2013_full_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/arithmetic_and_geometric_sequences_worksheet_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/fulusavut.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/bt_home_hub_4r_manual.pdfIn PDF document text
    • http://tunivepusage.epizy.com/foot_and_ankle_international_author_guidelines.pdfIn PDF document text
    • http://midelex.epizy.com/disney_xd_uk_tv_guide.pdfIn PDF document text
    • http://datonojafasaxup.rf.gd/46152503908.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/korogujo.pdfIn PDF document text
    • http://mimewimirul.rf.gd/jamalpur_weather_report_7_days.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD787 5272 bytes
SHA-256: 616275bcadf60b9791d954de14a946866f27f81ce5131c8314a93b6b9c3bcedb
font_01_sfnt_off0000e925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE925 11680 bytes
SHA-256: d18e3c853ee48f29e0241d9fed8ae9f85b3ddf1fb1b0350d9d4dd47c0bfa6739

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