Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9aa19159dbf8991…

MALICIOUS

PDF

200.5 KB Created: 2021-03-06 04:56:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 83c16abaa485286dc0e3cf9c86404797 SHA-1: 08279e01f8fe8b4704bcb72ec1852c4ca3d008c0 SHA-256: f9aa19159dbf8991153e4f67ce6e73806b2071b4f0115af65ec7d22b5d26957c
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document uses a deceptive lure related to 'Immanuel Kant' to trick users into clicking a link. The link redirects to a malicious URL, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/123?utm_term=what+is+immanuel+kant+best+known+for PDF link annotation
    • http://texulateniz.iblogger.org/samsung_top_load_washing_machine_buttons_not_working.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/sakedonomewenuwopa1komo.pdfIn PDF document text
    • http://nosinoski.shop/mcdougal_littell_literature_grade_7ou5cd.pdfIn PDF document text
    • http://help-verification.com/22835827141t9jmo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487416/normal_60089c12eac93.pdfIn PDF document text
    • http://sifimomikev.sportsontheweb.net/how_to_use_pellon_tear_away_stabilizer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449777/normal_5fcbd097be1ba.pdfIn PDF document text
    • http://fruit-ita.fun/81329179157f58e8.pdfIn PDF document text
    • http://revodegasiger.sportsontheweb.net/43250858108.pdfIn PDF document text
    • http://ccckkkkk.space/metawilegukubiranusezutuqi4ka.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/fSrhihe/kick_kung_fu_video_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/gdjbs7j/61190425845.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/why_is_personal_appearance_so_important.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pejenusiloxo.rf.gd/zotavifadovo.pdfIn PDF document text
    • http://lukafimagog.atwebpages.com/ridgid_10_miter_saw_laser.pdfIn PDF document text
    • http://fasujenijasezos.rf.gd/suncast_auto_rewind_hose_reel_lowes.pdfIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_183c854df2de4e32a44ee83c55b3778b.pdf?index=trueIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_7bf399f1e611403984229c7f037760ce.pdf?index=trueIn PDF document text
    • http://pixoriwabivonol.rf.gd/tobiluxeforoxukuveler.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7AE 5196 bytes
SHA-256: 250e6d630eda7cb987449a5a828767c14f3e97420b2d7cb8de39fcedaf153c72
font_01_sfnt_off0002d940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D940 13596 bytes
SHA-256: 1a64717803b1a0ca085883a3ae89c879725f34a1a67f83fa58d85bb1dfb7a734
font_02_sfnt_off00030440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30440 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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