Malicious PDF — malware analysis report

Static analysis result for SHA-256 660b959e273e32fb…

MALICIOUS

PDF

76.3 KB Created: 2021-03-16 06:04:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ad214f9e8a6ff29809635b28aa43de27 SHA-1: dfc54e58fb630509a7196585a5727a9f63400842 SHA-256: 660b959e273e32fb128599eca9eca20b71447ffb41512d0d3643be376e52cefa
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 0.9997

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://xezojetit.ru/123?utm_term=archmage+xylem+arms+warrior+guide PDF link annotation
    • https://cdn.sqhk.co/xiruregexibe/ihfjcZ0/vanilla_sponge_cake_recipe_with_milk.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/guide_for_pes_2017_pc_free_downloaddtzpw.pdfIn PDF document text
    • http://astropsychology.website/19000831436d51i9.pdfIn PDF document text
    • http://xtreme-sport.ru/fafiwarovogigekifaydr1q.pdfIn PDF document text
    • https://wumefabifu.weebly.com/uploads/1/3/4/8/134888429/589538.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/chdrEgd/adobe_illustrator_draw_app_for_pc.pdfIn PDF document text
    • http://reflectionss.space/sedunexazidukebezubetipijc8le4.pdfIn PDF document text
    • http://cparta.moscow/79580459181jpks7.pdfIn PDF document text
    • http://hookup154.fun/kaluzavikegaxunotevmlsxo.pdfIn PDF document text
    • http://vinograd.io/kinetico_water_softener_service_manualqkqee.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/2hcvjhN/ice_scream_4_horror_game_download.pdfIn PDF document text
    • https://godosofebi.weebly.com/uploads/1/3/4/6/134651625/571ddc44eebf460.pdfIn PDF document text
    • http://zdsshop.top/10490929756nhfuw.pdfIn PDF document text
    • http://infonewstravel.com/1892766314bkg4t.pdfIn PDF document text
    • https://kimilofu.weebly.com/uploads/1/3/0/8/130873947/tegujojig.pdfIn PDF document text
    • http://afracheat8.xyz/maytag_bravos_xl_dryer_sensor_not_workingqqyzl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_880256d17cce4ef9b211817c1becbb3c.pdf?index=trueIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_7f31a8d228294ab593ae6cdc7c0f8163.pdf?index=trueIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_9a73e3b4ec4a49d9a4246a75cad8db73.pdf?index=trueIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_100f150bd75545208149bf01fd071f01.pdf?index=trueIn 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_off0000ecda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 5604 bytes
SHA-256: e17b1f651ad8c626aa33051050922d70e25d9cf7564812d72e0bb1e698099ac2
font_01_sfnt_off0000ffd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD1 10584 bytes
SHA-256: 63f2b2254cbb9e1c1c28e76a8f8cbcf032a9d6ee5cb4fff9d90171cf7b2a3676

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