Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b754cade16f66d8…

MALICIOUS

PDF

69.9 KB Created: 2021-03-10 06:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: af6838f2593397ac354b66e157250e4d SHA-1: a80cd97ef0b0a3d7dfd5d0be7ce3e1df71ba56cc SHA-256: 9b754cade16f66d86127d20d1a5cce40b79412264f6286dce90cae606b40d96c
126 Risk Score

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 0.9991

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://midufefew.ru/123?utm_term=kebutuhan+dasar+manusia+kebidanan+pdf PDF link annotation
    • http://options.expert/82092130522dcax9.pdfIn PDF document text
    • http://kostlike.site/xenitatafoew3.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/jdKgejj/nivuzem.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/DqggeZd/fovoxikezabufa.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/hbgjIjg/45548984127.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/how_to_practice_english_speaking_at_home_youtube.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/does_dominos_do_gluten_free.pdfIn PDF document text
    • http://lofitner.buzz/simplifying_radical_expressions_worksheet_answersoip3j.pdfIn PDF document text
    • http://weridif.medianewsonline.com/88203452920.pdfIn PDF document text
    • https://cdn.sqhk.co/nazujovo/aehjrgc/27646968123.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/jEhjgiO/nofajomizagidax.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/ZCzifij/drop_kick_soccer_ball.pdfIn PDF document text
    • http://soinjaga.ru/benevolent_fund_form_2018_kpkeagu0.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/j2bFrBf/playstation_network_account_recovery.pdfIn PDF document text
    • http://goxekifujal.22web.org/algorithm_and_flowchart_exercises.pdfIn PDF document text
    • http://tobalalupuvobiv.iblogger.org/4k_video_er_for_macbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zupitatip.atwebpages.com/doxefipivozaxodi.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/9496980699.pdfIn PDF document text
    • http://jipatevalogot.epizy.com/95281267420.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/zanoxiborusigobojuxivoket.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/31333458608.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/mumudinazifigizopu.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/lirotasojofipori.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/20647326971.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/76056534348.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_off0000d54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54C 5424 bytes
SHA-256: 2df161e79d57b7182897dbd132f623672e11864bd6c74488cdb8bd1ae3913a26
font_01_sfnt_off0000e786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE786 9916 bytes
SHA-256: 1af5d802219cd25fc9e2064f67c9339b2d78aa43a7679c32095bd40985a509d4

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