Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d138647405b4875…

MALICIOUS

PDF

80.0 KB Created: 2021-03-20 16:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ef72feb1b535d8c65f865cea3d966c5e SHA-1: 72a4ee8ee5585188226687a66820c730c0bd60a4 SHA-256: 2d138647405b48752facdf66bc4ec9902f078d0ba9919543f8b9a20fee9a3462
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=caballo+de+troya+1+jerusal%25C3%25A9n+1984+pdf PDF link annotation
    • http://8gusevshop.website/bible_quiz_in_tamil_with_answersu7v7f.pdfIn PDF document text
    • http://cmb-accueil.com/907795411093ezqn.pdfIn PDF document text
    • https://cdn.sqhk.co/xalesikozip/eWJCCgc/kebiw.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/igjogi7/nixotaxap.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/rQhezjc/fake_caller_id_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/egcczjb/kavaj.pdfIn PDF document text
    • https://cdn.sqhk.co/tufiroxova/gehhsex/pekovovewawaxe.pdfIn PDF document text
    • http://test123test.xyz/plt_legend_bluetooth_keeps_disconnectingyhupl.pdfIn PDF document text
    • http://fastgetme.online/vezovadabgpqkf.pdfIn PDF document text
    • http://akb54.ru/automotive_lighting_market_reportd08oq.pdfIn PDF document text
    • http://asia.kiwi/41456678807b3o6.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/giUUf7o/hettich_drawer_runners_soft_close.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/jaBhbgc/w3schools_javascript_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/id2ibgh/free_survival_fire_battleground_battle_royale_game.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/34f657dc-1f5d-4530-b971-8cf8afba4ad0/chocolate_and_tan_dapple_mini_dachshund.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2a3d11-6203-4a98-8cdb-84875e4456b5/firefox_48_download_32_bit_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/gukovonevapefewejaba.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/29158950235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a1b935-5197-46ed-a08d-dce13757938e/zuzisawilesemafoxew.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/4167945662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a50e3865-476f-46be-add1-1c271ce2ea88/what_does_chit_mean_in_gardening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1eebe2-3d4e-4f13-9cb5-3be028da48d4/how_to_sketch_for_beginners_using_pencil.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_off0000f4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 5892 bytes
SHA-256: c0480d0ae39382e8dfd5896795f021214e6779c21d4074ce677a1796cc2be537
font_01_sfnt_off000108b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B2 12088 bytes
SHA-256: ce9001e06ac92471edd2f3d43101507f099807ee26e392b1b5d5adbb1d69a651

Open this report in the interactive analyzer, or submit your own file for analysis.