Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa56b1e19fe62611…

MALICIOUS

PDF

74.1 KB Created: 2021-03-04 20:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: d668221060f7e9fe6d62cd44884f665a SHA-1: a365e76937f54d0856fd762d9f506cf25b54150a SHA-256: fa56b1e19fe62611fa20e4f2c02f4ab37e504d285154035380691ebfa89d9dc0
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, 'https://resalured.ru/wix?keyword=chapter+19+acids+and+bases+test+answers', suggests a phishing or credential harvesting attempt disguised as educational content. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs are indicative of a malicious document, likely delivered via spearphishing.

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://resalured.ru/wix?keyword=chapter+19+acids+and+bases+test+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405899/normal_60194ab4f1eb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5ff57f4ccd46b.pdfIn PDF document text
    • http://cheatyou.site/589670598781e3pl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_603a3dc1b1ae4.pdfIn PDF document text
    • http://legendbilisim.com/stack-on_armorguard_24_gun_safe_reviewszx1gi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450519/normal_5fe3ffbec102a.pdfIn PDF document text
    • http://1freedom.space/ley_de_propiedad_en_condominio_2020_pueblaymnqi.pdfIn PDF document text
    • http://peramen.22web.org/mawisimital.pdfIn PDF document text
    • http://tadudibelebow.iblogger.org/how_to_set_up_a_second_echo_dot.pdfIn PDF document text
    • http://gufutaca6.xyz/leveson_inquiry_reportgzpx8.pdfIn PDF document text
    • https://konomotawet.weebly.com/uploads/1/3/1/3/131379362/6100652.pdfIn PDF document text
    • http://pedugubugof.mywebcommunity.org/29596191457.pdfIn PDF document text
    • https://seruborakumew.weebly.com/uploads/1/3/4/8/134849990/1259624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_5fdad55ddc31d.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/legegekozefagoloz.pdfIn PDF document text
    • http://flash-sar.online/20259352935ygpi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/chillhop_spring_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/49346899891.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/13560531160.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/now_you_see_me_300mb.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_off0000e5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 5476 bytes
SHA-256: f76953a71ca9e6188dc874fc9343d8d2cc32148c730822c6b9014b227f983418
font_01_sfnt_off0000f862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF862 10172 bytes
SHA-256: e34c22643c215bb8ec3ff27aec4ac7ac968020b1aad2de98982a145527412126

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