Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4025f7ff6b9db5…

MALICIOUS

PDF

75.9 KB Created: 2021-03-27 19:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7487ba2e2223748aadbe4b71b0c629e7 SHA-1: 53eebe9c25e753709b8f2d4595f20f545dd6ccd8 SHA-256: dc4025f7ff6b9db5b540bc6b720c209b98fa903b81208da6de627a504bd19399
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 0.9991

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://fokemale.ru/123?utm_term=marvel+cinematic+universe+movie PDF link annotation
    • https://cdn.sqhk.co/zanivuwiduvo/hcrjiaO/1831843604.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/oracle_sql_get_date_with_timezone.pdfIn PDF document text
    • http://wunegufope.iblogger.org/arabic_translation_to_english.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/39jNhx3/kazuviremexobur.pdfIn PDF document text
    • https://cdn.sqhk.co/zatugudaxaji/jagch2u/64360019395.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/jegj6hc/optical_illusion_in_tagalog.pdfIn PDF document text
    • http://razixir.22web.org/algorithmic_trading_winning_strategies_and_their_rationale.pdfIn PDF document text
    • http://mumopajikex.mygamesonline.org/pasteurization_of_fruit_juice.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/SPjhjgY/gameboy_color_link_port.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/dual_energy_xray_absorptiometry.pdfIn PDF document text
    • http://filmera.ru/gowomasa25uo2.pdfIn PDF document text
    • http://zeropium.com/hermann_hesse_siddhartha_trans._by_j3na0s.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/JDjjhbR/82850247834.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/idjjlAd/story_saver_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/g6hjtdB/gumball_watterson_height.pdfIn PDF document text
    • http://watodakazo.22web.org/cash_book_mcqs.pdfIn PDF document text
    • https://cdn.sqhk.co/fusuwudofal/e1rVhfN/home_shopping_decor_et_design.pdfIn PDF document text
    • http://mynasert.online/900478166962fmyw.pdfIn PDF document text
    • https://cdn.sqhk.co/vuluzazogur/ebgdjat/buggy_rc_car_top_speed.pdfIn PDF document text
    • http://kifenefazujiz.iblogger.org/guide_installation_livebox_4_adsl.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/jhc3ggC/hidden_object_games_apple_free.pdfIn PDF document text
    • http://reduslimitalia-official.website/musamulonodugoxiniliplm6p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kulebosux.myartsonline.com/mutoli.pdfIn PDF document text
    • http://zukegavodobuxas.epizy.com/sutozotitaruwaxokamata.pdfIn PDF document text
    • http://gototura.myartsonline.com/rixebilekutupaxajoninob.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_off0000ecf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 5008 bytes
SHA-256: 71e7a06793d61b6a5c54768c5334bfcefdca89129b732a256c686d443dab559e
font_01_sfnt_off0000fdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF5 10668 bytes
SHA-256: b7d9cc9ee8f2b8704dfb8b22bc42f6015e3b58d99f1ccd1f35fb02b8a7c24078

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