Malicious PDF — malware analysis report

Static analysis result for SHA-256 b954fc4aacd504a2…

MALICIOUS

PDF

69.6 KB Created: 2021-03-03 19:24:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 920467435e41039d066aa3efa4228aa7 SHA-1: 40e0067d4f4837a511c10762a12fb05ea6f8a532 SHA-256: b954fc4aacd504a27023c8000cbd698eaafdb30d7571cfd8431f4b58066e1d8a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/award?keyword=what+does+ti+amo+cosi+tanto+mean+in+english In PDF document text
    • http://farvestnn.ru/lisezoranajitowurupekurut0wj.pdfIn PDF document text
    • http://lamomusexosefe.66ghz.com/7_day_carb_cycling_meal_plan.pdfIn PDF document text
    • http://esclub.info/reading_comprehension_exercises_for_eso1i8a7.pdfIn PDF document text
    • http://wiwexar.22web.org/app_landing_page_template_wordpress_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5fcef3f545b0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455374/normal_602d3b0e1a846.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501962/normal_6005f7a14da84.pdfIn PDF document text
    • http://bivozebavi.iblogger.org/lobilagonidodobapujeforu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450890/normal_5ff3f4c74bcc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370744/normal_5ff7a1606e992.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/poguvelefa/allergy_report_today_austin.pdfIn PDF document text
    • http://valamujunitun.epizy.com/in_the_room_2016_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/dell_latitude_e7450_keyboard_backlight_not_working.pdfIn PDF document text
    • http://fujesotes.epizy.com/81923991263.pdfIn PDF document text
    • http://naxixexofeveto.epizy.com/aiag_msa_manual_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/agamemnon_text.pdfIn PDF document text
    • http://liwusetokabozil.epizy.com/zilimibobuvav.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/70581489926.pdfIn PDF document text
    • http://bopebogixa.rf.gd/94737890045.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/dosenozufilowudawos.pdfIn PDF document text
    • http://sewesomepajava.epizy.com/63474818674.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/camsurf_unban_apk.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_off0000d441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD441 5272 bytes
SHA-256: b6b17c6d59699383c1e885d82984283b8beb3a080edca40df55fa5394735c1ff
font_01_sfnt_off0000e617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 10088 bytes
SHA-256: cb4b85e320135cd14134b104fa333a337c2d4ff6d66aef4ad444bcbbce8fb461

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