Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97d63be6ef8a3d0…

MALICIOUS

PDF

78.8 KB Created: 2021-04-11 05:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cc2d0d1f14cd353da43e133d1c9465f0 SHA-1: 12331cc3b15d7157cd3655c624ab8b64443c434a SHA-256: a97d63be6ef8a3d0d3b4b5743626839db9d6bdd4242a71d689497d5685ecc32b
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://gimoguvi.ru/strik?utm_term=how+to+teach+conversational+english PDF link annotation
    • http://sokegex.mywebcommunity.org/99837917953.pdfIn PDF document text
    • http://wgathering.org/vovibotibulirakayymkt.pdfIn PDF document text
    • http://natur-bio.space/camerafi_live_youtube_facebook_twitch_and_gamemxcr3.pdfIn PDF document text
    • http://newutatokulu.getenjoyment.net/41734768396.pdfIn PDF document text
    • http://ledimpress.biz/the_servant_leader_james_autry_audiobookt8uph.pdfIn PDF document text
    • http://getveran.site/piwur5q25u.pdfIn PDF document text
    • http://coupons2020.info/devawizavawetal8kfl.pdfIn PDF document text
    • http://honey-love.ru/dojavubagavalidame6041v.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/25253705813.pdfIn PDF document text
    • http://xerujupuje.sportsontheweb.net/83311013380.pdfIn PDF document text
    • http://i-men.ru/36451730738xzybg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_d7d373824c4a498e9ae34ec9101155d8.pdf?index=trueIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_ca8d10a1bea24e8793cf92805d7035be.pdf?index=trueIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_e5d7c982ff09438a9e114c7bf7bb8a27.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c9e31c4-efda-462c-a24c-53f5cb527838/pilajexiwifexavutomita.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_21b0758325fc4177b149286924abd63d.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_699a5c977b814cc1a97b5a7e8262bfa1.pdf?index=trueIn PDF document text
    • https://a95edb9d-21e5-46e4-bb1b-b1fdf66a5dae.filesusr.com/ugd/09e34a_f8dbd8564f3e48428789fe4e65a0dd2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/528412c0-ee6f-4bd7-b41a-3b181a8ea948/maytag_bravos_washer_not_spinning_properly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af78604-a1b3-4c12-adb1-14a1ede25ed9/the_game_plan_full_movie_free_download.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_e14a2c2bae0444aeb22423f31f0f9b76.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b717e47f-ca7a-436d-a8aa-2df5e4ff457a/ridomuzepevamefonomekofad.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_off0000f57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 5172 bytes
SHA-256: 3dfdbe181b899bd4e6398ab450f409363579bdf85581606bc4ed5732ca0b6872
font_01_sfnt_off00010727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10727 11332 bytes
SHA-256: dc97ad3943938abb35aa36ede4c8990ab10c404651510c00e84ce3f43face7a1

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