Malicious PDF — malware analysis report

Static analysis result for SHA-256 7801c7f7aa5e76a5…

MALICIOUS

PDF

85.9 KB Created: 2021-03-15 14:29:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6d13a604a9969bb86721d2a69de77da3 SHA-1: a8174e90db8489fea0123f33360a24c7c38697af SHA-256: 7801c7f7aa5e76a561c4b12b23031c635dbdfb7ecbba2412f17ae86aa7a6b8ce
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 0.9992

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://soxebez.ru/wix?keyword=playing+patience+pdf+saga PDF link annotation
    • https://cdn.sqhk.co/baruduwege/7cWZvjj/candy_crush_jelly_saga_hack_apk_download.pdfIn PDF document text
    • http://dewexipe.22web.org/arvo_part_berliner_messe_score.pdfIn PDF document text
    • http://urott-hu.com/goresuzakiwibugf7220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419206/normal_5ff1b20e8c730.pdfIn PDF document text
    • http://wovolutoxali.iblogger.org/43323363989.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/iid9hcQ/99578510058.pdfIn PDF document text
    • http://flash-sar.online/56303316440klggc.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/jGzijx6/62751842565.pdfIn PDF document text
    • https://cdn.sqhk.co/kovajivika/gehfqwN/35826219984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_6037be45dd39e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426059/normal_6020a1812095c.pdfIn PDF document text
    • http://shimano-stradic.ru/88636190095b67iq.pdfIn PDF document text
    • http://sberhome.ru/sezezejutirikujajilhadmp.pdfIn PDF document text
    • http://pushbiz.fun/ginedunolazewafek4ajls.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/Mib0ibF/steven_universe_wallpaper_hd_pc.pdfIn PDF document text
    • http://esclub.info/4173735946073h8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502906/normal_601cd1bd121d8.pdfIn PDF document text
    • http://tradebot.space/dlshq_brahmacharya8bxfe.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuxopova/Ygfijih/clicker_heroes_calculator_ancient_souls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488315/normal_600f03a8a785c.pdfIn PDF document text
    • http://1xbets-regs.site/is_dish_customer_service_24_7apuo4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fivamoxopel.epizy.com/4082069613.pdfIn PDF document text
    • http://tabizamasozelo.epizy.com/gabigide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC14 5328 bytes
SHA-256: 956216372114a35b5b4b7c98053ea62b9d25fe8775f5ee9d134bca188dfaf43d
font_01_sfnt_off00010e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 11900 bytes
SHA-256: c4b0e4a8a66bb63c1b75f33a25219d5424183e80457a745cb26de05201fac3ca
font_02_sfnt_off00013551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13551 16204 bytes
SHA-256: abfd345a6ea1e62b83e5b81470e97c0bb38d81b9d626d8407e597eb2d2192f0c

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