Malicious PDF — malware analysis report

Static analysis result for SHA-256 770bed0e641a80e5…

MALICIOUS

PDF

122.2 KB Created: 2021-03-24 05:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: eebd36e08801c094b9b71462f0254c24 SHA-1: 2c9561abc16bc67ad544eaa9cf084cdb06652ac7 SHA-256: 770bed0e641a80e5d4495247eafa8e024892524d056ab1561e0f269bd2f38c66
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 0.9998

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://dugedepap.ru/award?keyword=beatles+chord+songbook+pdf PDF link annotation
    • https://cdn.sqhk.co/fofodafexadu/higjqhi/797162823.pdfIn PDF document text
    • http://logoped-samara.ru/75579159778kdka7.pdfIn PDF document text
    • http://fizarumokugafu.mywebcommunity.org/botanical_journal_of_the_linnean_society.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/iiZ93jf/bbc_pandemic_app_download.pdfIn PDF document text
    • http://pawusewi.sportsontheweb.net/rugoli.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/xthhgdJ/tower_defence_mod_apk_download.pdfIn PDF document text
    • http://smartcoin.design/75853132928fjaim.pdfIn PDF document text
    • http://mebelintera.ru/calculating_speed_time_distance_worksheet_answer_keyowlaz.pdfIn PDF document text
    • http://br1.red/are_lara_jean_and_peter_still_togethere5xpq.pdfIn PDF document text
    • http://lovelyhouse.online/shooting_star_meme_mp3_downloadwkn08.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/215a342c-02e2-4a1c-9495-4c9799efb3e9/what_are_the_types_of_country_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59a651a-040b-414b-9a29-d66932d00739/things_to_say_in_an_accounting_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce055668-98b7-43d3-ba34-8cc8f29bbb18/sadiwitumin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30178807-7b18-41ba-b72e-1f23a0772550/tokiwevapedogepa.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/wedenoxowara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666726dd-4fef-4410-a379-caee9a3dfefa/the_shock_doctrine_short_film.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c11bf11-67e3-43fd-9660-21285a3497c5/76402834668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8c5992-0705-46d5-8c63-5cfba43186c4/59549221246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0884cb02-b68f-46dc-9b9e-fd5de528f445/mistborn_trilogy_page_count.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2e5faf-1497-47a0-ac30-dabdbe5bc2f4/46370389084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba75d57-2ccc-40a2-85fd-b3d969b70c92/ps4_gold_headset_dongle_replacement.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_off00019f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F5D 5672 bytes
SHA-256: 32812147e1d48c521073fe08071c01f36b534bc0eba5690f072f8181fa065668
font_01_sfnt_off0001b2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2A3 13048 bytes
SHA-256: 646dee136466b0c0905b7805600c756767cf0b4e35d146e112486de2f21a6446

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