Malicious PDF — malware analysis report

Static analysis result for SHA-256 578758c34dac9f43…

MALICIOUS

PDF

102.3 KB Created: 2021-03-29 06:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73efe9a230be54069557d6f258275260 SHA-1: bc4c6d146cad50db6cac421dd152e470a3439ceb SHA-256: 578758c34dac9f43970301f6a95c639ae37b9b1a71e0efe21a5e5461015a9310
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ClamAV and an ML classifier, indicating it contains malicious content. The PDF contains a large number of external links, many of which are likely part of a link farm designed to host or redirect to malicious content. The primary URL points to a page that appears to be a lure related to "ventilator associated pneumonia prevention pdf", likely to entice clicks to the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-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://ponafet.ru/award?keyword=ventilator+associated+pneumonia+prevention+pdf
    • https://vopoxeja.weebly.com/uploads/1/3/5/3/135346001/9747225.pdf
    • https://cdn.sqhk.co/pabulibig/p4jehie/lego_hidden_side_graveyard_mystery_review.pdf
    • https://gilaxaled.weebly.com/uploads/1/3/1/4/131438091/5e66108755.pdf
    • https://static.s123-cdn-static.com/uploads/4490263/normal_5fe53fd6389f4.pdf
    • https://cdn.sqhk.co/vixukose/jgwdKhi/etude_house_lemon_sheet_mask_review.pdf
    • http://guferesuzas.22web.org/education_portal_e_kyc_report.pdf
    • https://cdn-cms.f-static.net/uploads/4419001/normal_601b11c106d7a.pdf
    • https://cdn.sqhk.co/zinazejoras/JMggdha/3496304445.pdf
    • https://pavadugubuwab.weebly.com/uploads/1/3/4/3/134309483/4da87326.pdf
    • https://cdn.sqhk.co/zojixemem/iidiWia/parchisi_star_online_rules.pdf
    • https://nabivuzofew.weebly.com/uploads/1/3/6/0/136050188/5168989.pdf
    • http://tijipavafetudo.22web.org/formato_minuta_de_reunion_excel_descargar.pdf
    • https://lavabowigu.weebly.com/uploads/1/3/2/6/132682694/338ac16ec3dbf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wedejilifolani.rf.gd/whatsapp_wedding_invitation_card_template_free.pdf
    • https://s3.amazonaws.com/suxugipipolazog/adjectival_phrases_year_4_worksheet.pdf
    • https://s3.amazonaws.com/gotitibekovi/adobe_creative_cloud_old_versions.pdf
    • https://s3.amazonaws.com/xiwevitox/90511039115.pdf
    • https://s3.amazonaws.com/wejuvono/zawaworuxatoximiwijise.pdf
    • https://s3.amazonaws.com/bepukuba/hp_laserjet_4050n_windows_10_driver.pdf
    • https://s3.amazonaws.com/nisoxow/mawobuvadufupivivigukax.pdf
    • https://s3.amazonaws.com/donake/preparation_of_benzanilide_from_benzophenone.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001452f.bin
a860b4ac7c97899f2c3a579ec232051b9ece2d5f2054f88dc09bab3d8b986a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1452F 5208 bytes
font_01_sfnt_off000156cf.bin
8273f2e0767e87d560a01b7a741be28d2be11a016e38972cab862a2415f73c84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156CF 11696 bytes
font_02_sfnt_off00017d77.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D77 4324 bytes

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