Malicious PDF — malware analysis report

Static analysis result for SHA-256 575a8ddfe846762d…

MALICIOUS

PDF

79.2 KB Created: 2021-03-17 14:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cded5fc01ca37f0de2c9df0634aee22e SHA-1: 726a596bcac74fdab6249e03afdf0677d2888c83 SHA-256: 575a8ddfe846762d6855ec3eb0e85da5ef345eebaf709e463922813c0ca6a0d1
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The document body, though heavily obfuscated, contains text related to sports trivia, likely serving as a lure to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=what+are+good+sports+trivia+questions PDF link annotation
    • https://cdn.sqhk.co/nesadatifu/ejajb2s/bell_miner_bird_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/zifalulog/9ibhiia/xavejonezexabemunufolik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417659/normal_5fec38f128f9e.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/hNoZ9CG/92314097726.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/ea8jgLR/win_98_simulator_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/dekorasenu/3jdOwhi/wejowekagugaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456369/normal_6036c9032adea.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/4Thgnjg/nufaravupakanezidufisajis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_6040b6bc9aa5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_60349203f0217.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/CQ1uhe1/7843947564.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_868e4c4f024349cd926db2e1eb910f4c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1efa86e4-3481-4738-adac-d8ac9de48df6/jaluvusofubewasafonemitak.pdfIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_b97ef053b26c4cfabc45546b484ec8c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/black_butler_wallpaper_hd_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99552ace-942a-4a22-94c5-1073dc29e12f/depression_era_cookbook.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/apa_citation_generator_apa_format_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374a7c9a-d210-4fcc-b3cf-14ab01ca29c6/does_table_salt_have_healing_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/nenexukigepin.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/download_python_3.7.5_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb014e0-c28b-4c9c-8427-1ae8e164304e/judepumitugewetovunepefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b289e24-ab7a-4f5e-a00b-ee23d5c50121/teranugonekoweku.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_off0000f6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D0 5388 bytes
SHA-256: 0dc3056c87eeac02f6f8a8843a6471dc02d2b08dc419ba08276598a765af8b62
font_01_sfnt_off0001092b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092B 11268 bytes
SHA-256: 5eb6344737fc65e9dccda6efc173c6989c5d8d22266baca266e5805d659698d2

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