Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b0d500e18a9617…

MALICIOUS

PDF

76.6 KB Created: 2021-02-17 23:12:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b65eddffd9fd8e9ac2b0dfe4c29bb56 SHA-1: 94405fda4cde871009737c08a7bb1fe04bb7799a SHA-256: 89b0d500e18a9617ccee4eda935289e73105c5eb32b40a7de5b13a407237adb7
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 0.9997

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/strik?utm_term=cooks+essentials+pressure+cooker+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446286/normal_6001bf96c6b21.pdfIn PDF document text
    • http://kungfumalibu.com/fatezasunijakovoqkck8.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/Rnhbiag/76859583138.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/he60jhg/pizito.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvivifid/Yiidvjh/lirik.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/jhZrDgh/fireboy_and_watergirl_1_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/7Jjbggd/75794092130.pdfIn PDF document text
    • http://circus.market/31109757869sfmi0.pdfIn PDF document text
    • https://cdn.sqhk.co/bewagolene/jhzRif4/26279409525.pdfIn PDF document text
    • http://modernstyle.pro/manualidades_halloween_decoracionqbke4.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/ggfpGjV/lilojalodanek.pdfIn PDF document text
    • http://koreanluxe.com/algorithm_manual4gn1p.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/QTqNyje/green_circle_colored_contact_lenses.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/hielgfr/10849394908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabizazixivak.epizy.com/12513123824.pdfIn PDF document text
    • http://bexituxupogetav.rf.gd/ihd_ishares_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/hd_wallpapers_for_pc_free_2016.pdfIn PDF document text
    • http://kitakel.epizy.com/criminal_hollywood_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/famew.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/cafe_coffee_day_case_study.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_off0000ed9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9F 5048 bytes
SHA-256: 5793ac82b9b6c3c04a6c77cde3857ad9d2a9e048328dec7ab886dc041099ffa1
font_01_sfnt_off0000feb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB7 11336 bytes
SHA-256: e4aa225fa4796b2b01f15c4b9032975932df86fcd04d9072e726283d9d0d9231

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