Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad254c7f207db85…

MALICIOUS

PDF

78.4 KB Created: 2021-04-18 02:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 34af372131a689d7f9be8cfc30a923c1 SHA-1: 894a582e1fddfe8da9fc23f90dbc183e816196c9 SHA-256: 9ad254c7f207db85222724d4c78c6f4f8409fde04808ef6eb37b38a6d5cb19a6
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 0.9992

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://lozipotod.ru/strik?utm_term=how+to+start+pole+fishing PDF link annotation
    • https://cdn.sqhk.co/xuluriwu/fiihfYR/house_of_secrets_hidden_object.pdfIn PDF document text
    • http://gutufozif.iblogger.org/casilda_rodrigaez_libros.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/EjiaS9v/bowuzapele.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/is_amazon_easy_to_get_hired.pdfIn PDF document text
    • http://nutusugeralinet.mypressonline.com/ina_bearing_catalogue.pdfIn PDF document text
    • http://wixosefimaba.scienceontheweb.net/why_is_my_printer_saying_there_is_a_paper_jam.pdfIn PDF document text
    • https://cdn.sqhk.co/goremujoz/MgigfF0/34182898941.pdfIn PDF document text
    • http://mitazaxajawusef.22web.org/11889052515.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/ehaP4eZ/gusotagegodon.pdfIn PDF document text
    • http://logunesunoj.medianewsonline.com/the_dead_sea_scrolls_translated.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/e07Gica/cartoon_sound_effects.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/the_meaning_of_marriage_chapter_3_summary.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/pdf_reduce_file_size_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawirir.atwebpages.com/1984326337.pdfIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_7b663305d9fb45449d58cac890a62eda.pdf?index=trueIn PDF document text
    • http://fogabifotu.rf.gd/game_pc_ringan_tanpa_emulator.pdfIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_5fa49c4b2dbf403382e1f1d064affc65.pdf?index=trueIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_d7242209e68044bdbd8c67c996329472.pdf?index=trueIn PDF document text
    • http://xadupozitolewoj.epizy.com/2005_nissan_murano_serpentine_belt_replacement.pdfIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_0b2297c8eaa44d62ac82350b6284daa2.pdf?index=trueIn PDF document text
    • http://zebajufomig.epizy.com/39851335131.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/bin_sachivalay_clerk_book_world_inbox.pdfIn PDF document text
    • https://f39f7cea-6337-46de-af4f-699959e6db0a.filesusr.com/ugd/004672_18ee830e2d374df3aa4e378cee79706f.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_off0000f421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF421 5216 bytes
SHA-256: adda6dab306ac1db41c554a88d7e77c83ec044c71299754c986edbfab265d531
font_01_sfnt_off000105ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 11188 bytes
SHA-256: b57575672953173c5bc5fd54617727bb80b462b917cdb77e2cd052a5c9c8fec0

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