Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e629c89b29deda…

MALICIOUS

PDF

77.7 KB Created: 2021-05-08 12:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c9984d832fa04dde6091d66f967f3c25 SHA-1: 2f5263f38615c26f5306b4093b324877852d965b SHA-256: a9e629c89b29deda3a7fc8d105afc84a8c0f07240335b80216e1f8fc6de814f1
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://xajibur.ru/strik', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be related to the URL's content, suggesting a lure. No scripts were extracted, but the presence of external URIs and the overall detection indicate a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=how+to+wear+silk+stockings PDF link annotation
    • http://discount50it.pro/propresenter_7_output_not_workinga2nqy.pdfIn PDF document text
    • http://bnl-jobs.com/lagu_terdiam_sepi_remix_dj1bjsj.pdfIn PDF document text
    • https://xufujume.weebly.com/uploads/1/3/4/8/134851049/zorotewipisu.pdfIn PDF document text
    • http://copyrightprivacy.site/347979499386bm5m.pdfIn PDF document text
    • http://nat-yoga.space/baahubali_2_full_movie_tamilgun20cjg.pdfIn PDF document text
    • http://cadenalia.com/how_to_begin_a_paragraph_in_latexh3mbz.pdfIn PDF document text
    • http://instacopyrightcenter.com/sepupigorepevizntvo.pdfIn PDF document text
    • http://cardioactiveitalia.site/how_to_calculate_days_in_month_excel96z9d.pdfIn PDF document text
    • http://manthoughtswebsite.website/how_to_reset_kenwood_car_stereo_bluetooths97u7.pdfIn PDF document text
    • http://vnds-super.space/hot_springs_spa_sovereign_manualz17ny.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/fbb5bddc.pdfIn PDF document text
    • http://thiswaytovogue.com/how_to_replace_lid_lock_on_kenmore_washerynree.pdfIn PDF document text
    • http://ig-support-service.com/basic_life_support_manual_ebookz9ydz.pdfIn PDF document text
    • https://merasata.weebly.com/uploads/1/3/1/3/131378960/badupa.pdfIn PDF document text
    • http://ionatr.space/infinix_note_7_price_in_nigeria_kongaqksgq.pdfIn PDF document text
    • http://wrestling-mma.com/87919485854urb1u.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/noluxediouslu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/5208223265.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/fopugisiniditelarosevij.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/10699389671.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/taylor_scale_walmart_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/93794514439.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_off0000ef6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6B 5084 bytes
SHA-256: 93d7c47b340ad3cebad1419405139e5ed275e126fd509e85210941c3523525b4
font_01_sfnt_off000100d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D7 11576 bytes
SHA-256: 29631d93fb434130c731ce97fb7da85df472283abf0b948672decb035c14ca6b

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