Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5bc0ebe5ea6ad5c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 20:36:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a7b841631af85838a63154106abb9fc SHA-1: 5d9d00c8684503621fd5473dad7faa84048ddd61 SHA-256: c5bc0ebe5ea6ad5c1b2fe053659deb224fe1c29924dc9c4bdf292e573b2d8174
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=functions+of+human+body+organs+pdf PDF link annotation
    • http://worabipupe.mypressonline.com/nutritional_biochemistry_book_free_download.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/51020565493.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/Uigjigd/leap_day_school_activities.pdfIn PDF document text
    • https://liwarelavoz.weebly.com/uploads/1/3/5/3/135398493/337580.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/world_of_darkness_documentary_soundtrack.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/ragabiwiwopijonezavij.pdfIn PDF document text
    • http://zowogusatutojus.mywebcommunity.org/73726263811.pdfIn PDF document text
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/pokerure.pdfIn PDF document text
    • http://vesajob.getenjoyment.net/57795040665.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/11412489972.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/ajc0BbP/bafupamut.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/CYifhA1/science_channel_go_dish_network.pdfIn PDF document text
    • https://cdn.sqhk.co/fomolunuvufa/hfnkow8/space_pong_idle_ball_ping_pong_challenges.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/jgetdgf/dumbo_movie_quotes_2019.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/41734036574.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gumizaxewa.atwebpages.com/u_verse_tv_guide_today.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_54eff0f4690d4f0ab9284afbc80d8bce.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_17c5609830bb4403b8a781161b37082a.pdf?index=trueIn PDF document text
    • http://zotubune.myartsonline.com/ionic_compound_how_are_atoms_held_together.pdfIn PDF document text
    • http://jujageritoxo.atwebpages.com/barcelona_metro_map_download.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_31462f871e3e45b1a48ca83bed6ee39a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 5500 bytes
SHA-256: 780cc9e6e86da3e66259bf154d2d7f161eb2e793aba3d6da36d471b1b6c7060f
font_01_sfnt_off0000f6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AE 10092 bytes
SHA-256: b700a2256e78633e9169fc9fd7b31a338b9af57a08aab958f358fcb49ab1ac73
font_02_sfnt_off00011943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11943 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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