Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5a8f0fb66f66f2…

MALICIOUS

PDF

77.1 KB Created: 2021-04-03 08:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ec30f4b6b7751370a4e7ecb84d661ac1 SHA-1: 21868dda9ce4cd7b706a5ddb2e55493c145c1c2c SHA-256: cb5a8f0fb66f66f2cf92dc463eb5ca2ed8ec6575b24152688f734c4e38d60cc7
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/award?keyword=certificate+of+incorporation+ny+pdf In PDF document text
    • http://mir23.xyz/breakfast_at_tiffanys_movie_download_utorrent8izga.pdfIn PDF document text
    • https://rupasofo.weebly.com/uploads/1/3/4/8/134892789/xupezewekexekes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_6060431ebceaa.pdfIn PDF document text
    • http://xuxodowenam.getenjoyment.net/7091328334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374978/normal_5fe36186b94a2.pdfIn PDF document text
    • https://tezimapegimera.weebly.com/uploads/1/3/0/9/130968984/aa09814a.pdfIn PDF document text
    • https://lewibodozibepa.weebly.com/uploads/1/3/3/9/133997785/zidol.pdfIn PDF document text
    • http://uscovidcharts.com/3456702057zk779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454299/normal_603173bd0d8f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5fe8b98bb1b91.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/27783848224.pdfIn PDF document text
    • http://creditreportus.info/bulbul_nest_information_in_marathiz82rd.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/statistics_for_spatial_data.pdfIn PDF document text
    • http://torixobo.mypressonline.com/angulos_entre_rectas_ejercicios.pdfIn PDF document text
    • http://classkaod.ru/sample_daily_attendance_sheet_for_students68zy0.pdfIn PDF document text
    • http://qiwi-wallet.online/nazag11sih.pdfIn PDF document text
    • http://ropufogesuzazeg.iblogger.org/wonitupeliwulumalud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dilizefolu.rf.gd/avast_cleanup_pro_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/codeigniter_user_guide_bahasa_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/how_to_play_munchkin_game.pdfIn PDF document text
    • http://zuwogupewukefet.epizy.com/rukesokipiwopivozi.pdfIn PDF document text
    • http://xutenasejubibe.atwebpages.com/plant_biotechnology_techniques.pdfIn PDF document text
    • http://dikaroko.rf.gd/31540360899.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/solid_state_relay_circuit.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/abdominal_aortic_aneurysm_surgery_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/46263711574.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_off0000f252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF252 4948 bytes
SHA-256: 38e9dc56eeacf1e76b255dedb605df2e76e5e440d1768e095e1c0824ebb17987
font_01_sfnt_off0001033f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 10356 bytes
SHA-256: 6dccc0faff012d9b1e3c751a792bb66adf6773952300faf2ef77e944e955ad46

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