Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c0c73f835250d1…

MALICIOUS

PDF

72.3 KB Created: 2021-02-26 13:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c45c43f73856f36f90a28cb46e2df779 SHA-1: f092efc9ee311478ac63ec456acc4a7b12a59f08 SHA-256: 34c0c73f835250d1b18c7c4859b5f052b9f29fb72516183948976ab5cbb52161
194 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.
  • 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.
  • 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/aws?utm_term=oxford+dictionary+lookup+word In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_5fea2de831a81.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/pleasure_without_conscience_meaning_in_telugu.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/what_can_you_do_with_a_computer_networking_degree.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/beats_studio_2.0_wireless_matte_black.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/what_are_good_books_for_14_year_olds.pdfIn PDF document text
    • http://yogist.fun/344602967i1d6a.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/zumugopajenezinofizib.pdfIn PDF document text
    • http://vizionsmc.net/89848834302tumim.pdfIn PDF document text
    • http://fabermanufacture.ru/4539408041760wq5.pdfIn PDF document text
    • http://gratoramaa.website/operaciones_con_funciones_ejercicios_resueltosq7ia1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458833/normal_5fc7588522486.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bototiluwoge.atwebpages.com/68770423276.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/55687723394.pdfIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/gojugesokeduvajikamuket.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/collybia_trip_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/lemon_face_mask_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/calendario_laboral_2019_peru.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/likogunodefovi.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_off0000dc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC77 5324 bytes
SHA-256: 33996d7264d09124042b6951f1d475b609f39302b5c148b26466f57b1e3ca144
font_01_sfnt_off0000eec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC1 11072 bytes
SHA-256: ece77cb262021d8815d3599d45756a33f5553e5e328d94cb862ca74d722c03a4