Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81c3ad3f8839a53…

MALICIOUS

PDF

69.5 KB Created: 2021-02-14 06:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4160cdf0ba488d05ab88c31bf665fcf9 SHA-1: dc4279c7f6b444dace9d9804a00a5080c5d247c1 SHA-256: c81c3ad3f8839a53fff08e87f55e703f786a59d803c096a61ce67e610014ff61
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/aws?utm_term=incorrect+details+on+credit+report PDF link annotation
    • https://cdn.sqhk.co/fusojafiza/gcdJia8/teboza.pdfIn PDF document text
    • http://masanakepatarar.iblogger.org/english_to_french_translator_application_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_60287fbc48e15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5ff0950cbcf0c.pdfIn PDF document text
    • http://vududodudo.22web.org/agilent_multimeter_34401a_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefabe/cad_3d_festo.pdfIn PDF document text
    • http://jugoribomepi.rf.gd/prevent_button_submit_form.pdfIn PDF document text
    • http://boponewutizubi.rf.gd/payday_2_holdout_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/standard_a_formica_calacatta_marble_laminate.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/puzzle_pieces_template_shapes.pdfIn PDF document text
    • http://sonazorapabame.epizy.com/ruxamex.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/xufonexapirizilevi.pdfIn PDF document text
    • http://mufunalera.rf.gd/los_angeles_lakers_cap_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/fate_grand_order_bb_event_guide.pdfIn PDF document text
    • http://kozuwuwupoxofi.rf.gd/dba_interview_questions_and_answers_sql_server.pdfIn PDF document text
    • http://dukizovisepo.rf.gd/dopupazaxiwagibirabevovik.pdfIn PDF document text
    • http://kowelakava.rf.gd/id_card_vertical_template_psd.pdfIn PDF document text
    • http://sobikunukozi.rf.gd/mezukalatuzi.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_off0000d39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39E 5004 bytes
SHA-256: a11ab1230559e565b68aa6f6dd68fa5561cab063657fa9aa08fdc11d93326b81
font_01_sfnt_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 10708 bytes
SHA-256: da8e5ce27c02243329207a5c377ceb2c7273cf7cfbdd6c1a34fb400b894c921c