Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b25eb12148b8fb…

MALICIOUS

PDF

82.8 KB Created: 2021-03-19 22:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7df04d2f2f02a8a31821cae133c84f59 SHA-1: 1692f2becee6439533f8aa9ab37422b913b00c2f SHA-256: c3b25eb12148b8fbbe07184e29d5486ca3a70e9ae7ca8514bf6a989271335edf
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-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://gimoguvi.ru/strik?utm_term=how+to+graph+instantaneous+velocity PDF link annotation
    • http://yandex-dostav.ru/breeding_time_dragon_city_guideiyahf.pdfIn PDF document text
    • http://losinglotterynumbers.com/extinction_coefficient_calculation_examplempisq.pdfIn PDF document text
    • http://agentsoft.space/apk_afterlight_2_full_packdvnun.pdfIn PDF document text
    • http://tosety.xyz/toro_lawn_master_2_reviewsgcrlw.pdfIn PDF document text
    • https://jakoxizejibak.weebly.com/uploads/1/3/4/3/134348863/dokiralo.pdfIn PDF document text
    • http://weinmvc.net/google_sheets_how_to_wrap_textfhxk7.pdfIn PDF document text
    • http://fitnesspack.net/2499720385ql2l.pdfIn PDF document text
    • http://youralteragoods.com/plants_vs_zombies_download_full_version_free_apkjc1uw.pdfIn PDF document text
    • http://supportcopyright.net/kaw_lake_duck_report1vnbf.pdfIn PDF document text
    • http://pubggaming.online/how_to_change_oil_on_a_mtd_snow_blowerqmt6q.pdfIn PDF document text
    • https://cdn.sqhk.co/lakisitu/PAjblZC/71018721493.pdfIn PDF document text
    • http://mkuu.club/error_code_ls-001885c36.pdfIn PDF document text
    • https://cdn.sqhk.co/makulowujip/ggKwhec/wevowibox.pdfIn PDF document text
    • http://olimp-home.com/kendo_chart_categoryaxis_templatekjhuh.pdfIn PDF document text
    • https://farejebizaf.weebly.com/uploads/1/3/0/8/130815013/xulabomirabavomufi.pdfIn PDF document text
    • http://small-italy.space/free_printable_coloring_sheets_back_to_schoolfyl7j.pdfIn PDF document text
    • https://cdn.sqhk.co/wabogojo/Q13jjF4/printable_thanksgiving_word_search_for_adults.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
    • https://uploads.strikinglycdn.com/files/b85e7f63-b849-47aa-92be-c7af46e5fdcd/boxawawofifuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df598735-def2-47c6-b0ca-375f2389defc/brother_p_touch_900w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58993ed-2046-46de-a892-05effca0bc10/pafoloju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F3 5292 bytes
SHA-256: fa7530e342711199d918eeff2d215d024b9fe4c442d13e7974a4656c59786be0
font_01_sfnt_off0001090a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090A 11336 bytes
SHA-256: 3125d7efa947cad35e3069fad0ff8ce4d707ce5c27586fe1ebc57315a27403d9
font_02_sfnt_off00012fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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