Malicious PDF — malware analysis report

Static analysis result for SHA-256 e616fc110055bc6a…

MALICIOUS

PDF

85.5 KB Created: 2021-03-04 18:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2aa7836d2c273623e53027114ea0bccf SHA-1: dce8c2b1e98ff4c6fb44e56f29e77036b8532247 SHA-256: e616fc110055bc6a236e1ff657fda0dcd69811d13ebc2b9d1e4660a9550a596e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=oogway+ascends+sheet+music PDF link annotation
    • http://tiktoktop.design/75102814547z4xnj.pdfIn PDF document text
    • http://pafexomasig.iblogger.org/sizes.pdfIn PDF document text
    • http://xploitcrew.io/mario_benedetti_corazon_corazay7ize.pdfIn PDF document text
    • http://com-connexion.xyz/968843081739vbze.pdfIn PDF document text
    • http://maykistore.ru/manual_de_organizacin_general_de_la_secretara_de_economa_2020yahim.pdfIn PDF document text
    • http://legiontry.online/balakalosopetaxubinojubgufhn.pdfIn PDF document text
    • http://favodokoleti.mypressonline.com/38083277510.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f2224c-a96b-45eb-87d7-dc7297e3857f/93587045571.pdfIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_e24ca12d12364bd4b57156b31593e94d.pdf?index=trueIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/gardners_art_through_the_ages_15th_edition_volume_2_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0058376a-6816-4413-9578-53648c800c45/jolly_phonics_workbook.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/18980167938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb464da0-74ef-49a5-a4d6-e5212821c9ef/how_to_use_the_lg_sound_bar_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29017d5c-0826-41f2-bdb6-5c16e90f08e9/craftsman_yts3000_42_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f4df627-a0db-4301-b90a-16a6d7342ec4/kenava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/220d38b3-bb49-456c-ae48-1e1fcea6bb83/33036257789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec65b0f-4471-4763-92d7-d69a9b6f82b6/muboxewukaneripunefafe.pdfIn PDF document text
    • http://wosetufawotuf.epizy.com/cyberpunk_2077_release_date_steam_countdown.pdfIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_402a977b971e4e46a2543856ce7bc162.pdf?index=trueIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_fcb61d9f25fe49939a3d8d7f83913672.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_off00010e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E80 5444 bytes
SHA-256: fcadf1856864aa8385031d2bc4a680fe91d707d43c2f627e704073a5962201b0
font_01_sfnt_off000120f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F9 11772 bytes
SHA-256: 3299feefe4b206b478ecb6b0b7aa2a491143205a5b5ef2a69733672935a0fabd

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