Malicious PDF — malware analysis report

Static analysis result for SHA-256 12540b6fd26142e8…

MALICIOUS

PDF

255.2 KB Created: 2021-03-28 14:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8ec908f42b883fa5fa934aca2284fd19 SHA-1: b9664f606dba3148557cca496b19b10f3a0da01c SHA-256: 12540b6fd26142e8e235215bfc02e11f16ba6d54d5ce511308d2551d7d13748a
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 0.9860

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/wix?keyword=personajes+de+la+segunda+guerra+mundial+con+nombres In PDF document text
    • https://cdn.sqhk.co/nelufebo/jcib5hj/ai_dungeon_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/mubafazus/xgeVo9B/bike_race_apk_all_bikes_unlocked.pdfIn PDF document text
    • http://zabavnyi-slon.ru/pokemon_gold__silver_primas_official_strategy_guide_downloaduhikf.pdfIn PDF document text
    • http://lojasamericanasbr.com/153134040300k4h5.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefoveniri/jDCh9he/femejutadanufozo.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/diibtaW/25212953422.pdfIn PDF document text
    • http://ighelpcenter.xyz/starcraft_3_trailer_officialm8r5t.pdfIn PDF document text
    • https://cdn.sqhk.co/vexavudakepa/8ijjdib/blockman_go_bedwars_mod.pdfIn PDF document text
    • http://mx50off.info/american_red_cross_cpr_certification_test_answers185ws.pdfIn PDF document text
    • http://habirovradik.ru/which_lavazza_coffee_is_best_for_espressoqijmo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pudubekij.epizy.com/la_casa_de_papel_episode_guide_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7345dd97-e39e-4041-9b47-79e4999147e8/71818340968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cdfd4f2-8363-4746-8d6b-d21de636775e/18173420219.pdfIn PDF document text
    • https://1f53f175-067f-4140-b001-f66bebc9855b.filesusr.com/ugd/c711d8_d3510d51320f4449ab8404d41e46217b.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_474171315e4249df9e87a7e8ea672eca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0070550-24d6-4e1a-b714-b38e23d1f82e/this_is_amazing_grace_song_select.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_19c92a6a648f45059d23f0969c812742.pdf?index=trueIn PDF document text
    • http://torumaxot.rf.gd/wuluribumadewokajewevut.pdfIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_029f60143f6441caabd24f19ca27bb06.pdf?index=trueIn PDF document text
    • http://gazepofibugas.epizy.com/fevalasaz.pdfIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_00892fb7d7654faca1d8e101b82659bb.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_731bf30506a8489d98c9647256179b8f.pdf?index=trueIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_16c02c86bab2461bb43fb012057a8438.pdf?index=trueIn 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_off0003aa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AA94 5476 bytes
SHA-256: 2ac6693eb47a0be6ed5f93c44c2cc29698ff8bac9fb591c79c0cb9f8467efd03
font_01_sfnt_off0003bd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BD1D 15756 bytes
SHA-256: 71fd32013d34de7a23bb4fc6b622a220bc429d2b4548365a14fc5e036851a866

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