Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58bf479000025cd…

MALICIOUS

PDF

83.9 KB Created: 2021-02-16 21:09:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd359231903201988e57f0e82ccba408 SHA-1: 96e717922af3424f9b95741f3940f3fda4d089c0 SHA-256: c58bf479000025cd5f3357c2edc6ca27c6f7ac788b5febd143a33f5c1dbca298
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/123?utm_term=how+to+beat+turtle+rock+link%2527s+awakening PDF link annotation
    • http://wugafis.66ghz.com/connected_apparel_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/ihidhe1/super_dancer_chapter_3_remaining_contestants.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_602842b17c2c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5ffe49d633b75.pdfIn PDF document text
    • http://sawegazid.iblogger.org/69338245578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5fdc3399ba030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_5fdc85535d7dd.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/qgfMuyZ/vr_home_tour_software.pdfIn PDF document text
    • https://cdn.sqhk.co/mekutitesi/gyiYgjC/76347169615.pdfIn PDF document text
    • https://cdn.sqhk.co/gujamozulas/8FgdhbV/free_animated_video_maker_software.pdfIn PDF document text
    • http://myluckywin.site/halo_beyonce_pianopyhl2.pdfIn PDF document text
    • http://fepemewavitik.66ghz.com/all_free_bootstrap_themes_templates.pdfIn PDF document text
    • http://samozanyat.info/zidozogusuxwcxq4.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/gfgiehb/50791943158.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/jjeJXij/75211566827.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/jec0je2/poutine_near_me_vancouver.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/0gijChR/pew_pew_iphone_trick_doesn_t_work.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471481/normal_6020ff9ad68b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472200/normal_6003369d918fc.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://kifemulawej.epizy.com/charlie_puth_mother_song_320kbps.pdfIn PDF document text
    • http://kiwasebax.epizy.com/sotabuburosilewuwisale.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_off0000ffaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAA 5140 bytes
SHA-256: e6bd963cbaae2542eed581ea59c6010431d73bcf34bdeba2cac66987a78ea4ec
font_01_sfnt_off00011149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11149 10092 bytes
SHA-256: 01811bc688969030ed391e023513adcdc17fbfa701b0e26d898d2f562e7ce7ba
font_02_sfnt_off000133ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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