Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d3e98efdd42c91…

MALICIOUS

PDF

68.8 KB Created: 2021-03-19 10:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9e985c63013c13eda618a8325cc73e0 SHA-1: 69cfa36aefd35e0688de09370d106587188cbdd0 SHA-256: b0d3e98efdd42c916b9a1e15585850e43325ab5e42e1e71771c4c1b4db4e25bf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains embedded links to external websites, with one notable URL being https://xezojetit.ru/wix?keyword=i+wish+you+still+love+me+lyrics, suggesting a phishing or content-luring attempt. The PDF also contains a link farm pointing to numerous other PDF files, indicating a potential effort to distribute further malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=i+wish+you+still+love+me+lyrics
    • https://cdn.sqhk.co/naxudufejik/bMidUaw/43262779147.pdf
    • https://cdn.sqhk.co/tilesoxeg/p9846Dj/tevasidegixalevu.pdf
    • https://cdn.sqhk.co/wogefosa/hhhijae/komededijavipumuxuwefap.pdf
    • https://cdn.sqhk.co/wejideduv/jiij30a/hokey_pokey_song_for_kids.pdf
    • https://cdn.sqhk.co/subogutaze/dpKkhg1/67742907046.pdf
    • https://cdn.sqhk.co/jafakitiw/jhiaoig/10301998183.pdf
    • http://xevamaz.iblogger.org/14421464451.pdf
    • http://kixubakebe.iblogger.org/stihl_weedeater_fuel_mix.pdf
    • https://cdn.sqhk.co/fogunedevare/hfHkghv/14844264132.pdf
    • https://cdn.sqhk.co/xamizine/coPK0hb/83754785219.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xonobijikivo/roliv.pdf
    • https://s3.amazonaws.com/mejados/tojiwonujelilumeta.pdf
    • http://sosejuxosi.epizy.com/vadirewatonubadim.pdf
    • http://runopokasuvi.epizy.com/sirobonuzafikogawadoti.pdf
    • http://tiguvazigavis.epizy.com/jowijosiriranuf.pdf
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_41d040e998274288a4ab31ef7e9767a1.pdf?index=true
    • https://63f3b980-df56-4d16-8c75-de9131d8e0d8.filesusr.com/ugd/b7fdcf_389cde600aed49d8ac64e43e50d0b852.pdf?index=true
    • http://dugipiwem.epizy.com/sokit.pdf
    • http://najabofumason.epizy.com/bodib.pdf
    • https://s3.amazonaws.com/bejenosugede/barcelona_rail_map.pdf
    • https://s3.amazonaws.com/sedimeraxufi/use_doubles_facts_lesson_3._1_answers.pdf
    • https://s3.amazonaws.com/dorobukasawituw/adharvam_film_songs_free.pdf
    • http://xazitew.epizy.com/answering_service_one_reviews.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1e6.bin
9d135d228d3fb279805eb0ee122a7547fa3af0ec6c04c5dba012fb770add6d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E6 5020 bytes
font_01_sfnt_off0000e2ec.bin
87e396dbed4aeceb64d614b13a4533f1c12f627a503172bf2bba257671d8175e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 10036 bytes

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