Malicious PDF — malware analysis report

Static analysis result for SHA-256 673aa2df2bbc99aa…

MALICIOUS

PDF

64.5 KB Created: 2021-02-01 09:58:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: f3436ccba1117ae839a7a0b868bf1df9 SHA-1: 28f5477be3531f1ad4e80cc16fe2578bb4a669f9 SHA-256: 673aa2df2bbc99aac3109823982ed7ba07a0d929245bea4a0d1bca6163dd1c2c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=cookie%20cutter%20wedding%20cake In PDF document text
    • https://cdn.sqhk.co/lobinazema/8jjhiPv/oof_button_smg4.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/k8jNie9/sat_practice_test_4_answers_kaplan.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/operations_management_textbook_online8zdeh.pdfIn PDF document text
    • https://cdn.sqhk.co/revinoxu/Bgcywjf/play_classic_skip_bo_online_free.pdfIn PDF document text
    • http://italiahot.fun/craigslist_maine_for_sale_antiquesk55va.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/aibtYAu/jio_online_recharge_399_debit_card.pdfIn PDF document text
    • http://itactical.xyz/god_still_speaks_by_john_eckhardt_pds7v81.pdfIn PDF document text
    • http://blacktea.space/15848658966g8if2.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/Bijhdja/here_i_go_again_chords_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/ifI1D0s/danozedeweziwezoju.pdfIn PDF document text
    • http://sexesex.site/research_proposal_budget_exampleq4k1q.pdfIn PDF document text
    • http://wowitaly.space/tomie_manga_downloadzgx49.pdfIn PDF document text
    • http://technodom11.com/838432290006pb0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mosakokomu.epizy.com/all_souls_book_2.pdfIn PDF document text
    • http://bekujefil.epizy.com/38845776415.pdfIn PDF document text
    • http://girupesoja.rf.gd/functional_analysis_rudin.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/bollywood_video_song.pdfIn PDF document text
    • http://bitinorakinin.epizy.com/27013800751.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_off0000bd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD42 4960 bytes
SHA-256: af161236f3335c0ad15530be5d28e651fb2ff100a38b3391524d2ed6d2e3e6bb
font_01_sfnt_off0000ce44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE44 11308 bytes
SHA-256: 9371b1accdefd28c59f7b452563105fe960a0174fe3eb28d316db94bb2819c65