Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7585e55657ff0ee…

MALICIOUS

PDF

75.4 KB Created: 2021-04-15 19:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8bbcd1028e7ab77ed906ead4f1729fbb SHA-1: 870901a63c0d2a6322b99887a34960e86bb325ae SHA-256: e7585e55657ff0ee9806250a97d1ee38d5087a0e193f67ef7a8289aba8a0edb3
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-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://pelibifir.ru/strik?utm_term=minima+moralia+review PDF link annotation
    • https://cdn.sqhk.co/wifavizen/ehdhgeZ/soccer_live_scores_odds_2in1.pdfIn PDF document text
    • http://walletelectrum.buzz/executive_assistant_cover_letter_template5kj9u.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/21318126607.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/aJxjeia/32745236547.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/apartheid_in_south_africa_history.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/el_almohadon_de_plumas_horacio_quiroga.pdfIn PDF document text
    • http://tarekupi.scienceontheweb.net/75340546517.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/top_safety_rated_infant_car_seat_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/gijjXwA/xfinity_series_race_results_today.pdfIn PDF document text
    • http://whitetwo.space/verolcjtna.pdfIn PDF document text
    • http://mmamba.ru/ligerepakepipoktfoqf.pdfIn PDF document text
    • http://bufibinokurun.scienceontheweb.net/zogidep.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/hmPhdjg/t_i_game_street_racing_3d_hack.pdfIn PDF document text
    • http://malolufixanovas.sportsontheweb.net/80902755969.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/paxunugaxab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vifidumefitur.atwebpages.com/carrageenan_journal.pdfIn PDF document text
    • http://zevusup.atwebpages.com/advanced_statistics_and_probability_questions_and_answers.pdfIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_1f0099e1a85346bb938386ba047e986d.pdf?index=trueIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_d74536e3e3e0427b9b8580f9b2ea4146.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_e9fc993fb2a845788bc015404e01fe42.pdf?index=trueIn PDF document text
    • http://bejanifezilo.atwebpages.com/89447015000.pdfIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_ec2a9ae63c9a4e1fa8a46ccaafce0c54.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_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 4812 bytes
SHA-256: fa85055b0c2200eeecb747c9f090a3b72009ea8ec8578a8b37ae0213349f8c3a
font_01_sfnt_off0000fafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFB 11016 bytes
SHA-256: 98fb130bac1947652ea209c44e635b390b953bdf923a61f5844378a6cacbf9b6

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