Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8055861fcc6c40…

MALICIOUS

PDF

74.6 KB Created: 2021-03-14 08:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c50d3058f0bd9dd795d48d1fb24fb46d SHA-1: 5aa3cfa7c628b447bbe117185a1a75daf1ca6560 SHA-256: 1a8055861fcc6c408c704d9fdef2b1e5bf94e042f21cab1ade4821bd6b5bf0a2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/123?utm_term=coordinate+geometry+class+10+pdf+ssc PDF link annotation
    • https://cdn.sqhk.co/pulovafafita/FijPjjs/pulling_usa_2_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_603f23e7481b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_60233565a21c5.pdfIn PDF document text
    • http://wurulef.22web.org/informacion_sobre_las_ballenas_azules_en_ingles.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5fec84c8c5e1e.pdfIn PDF document text
    • https://cdn.sqhk.co/guxudakakali/Uhfihjc/bidas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_600b2c3b4563c.pdfIn PDF document text
    • https://cdn.sqhk.co/gesimefav/FCieigq/xegowapek.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/hiXXgiw/lixilakepujuxaximuvube.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/wjcjbjb/9937437106.pdfIn PDF document text
    • https://cdn.sqhk.co/gixofusofago/jbrOIhe/iphone_11_ringtone_zedge.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/0Qij1m4/kularizebujedifibedoviwo.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/ahhgKI6/blocky_farm_unblocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e24043-bc5b-42eb-95bc-172c7f35b525/how_to_answer_a_plantronics_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdac34c6-f61c-43e4-a380-0408675a3089/73290743029.pdfIn PDF document text
    • http://surifetopene.epizy.com/beginner_s_russian.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/canon_in_d_violin_score.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3196f88d-a0fe-4a30-87d5-5ad11aac84da/kowimutolojutoxop.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/roramude.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_off0000e252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE252 5676 bytes
SHA-256: 1a8f89390dfad097be14f73d888b76e1ef4a7ed08a65faeff69ebd53c4d06afd
font_01_sfnt_off0000f596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 11604 bytes
SHA-256: 9c224f9968b11fb3aecb9121b1687a8742277a73393f29dc3d5179d5cae3999c

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