Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa65638242b609c…

MALICIOUS

PDF

63.9 KB Created: 2021-02-13 06:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 70eab10d2710027461be4da9957b4c8b SHA-1: 1a02b599da4fb3ec8600d4f6f16d2a413dcecac5 SHA-256: bfa65638242b609c44722cda316bc8318c72332be81f0b80ff0d08df4c51829c
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://maypoin.ru/123?utm_term=sherwood+school+district+arkansas PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422884/normal_5fe3743fb5c31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477873/normal_5ffbb2974742c.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/JhfMjdO/bounce_game_code_nokia.pdfIn PDF document text
    • https://cdn.sqhk.co/golomamone/WSjc7hi/ice_crushing_machine_walmart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448332/normal_5ffcbb25a636b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_601bde971d408.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/HUTidgc/how_is_apparent_retrograde_motion_explained.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/posufij/kegolosofoteg.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/yanni_nostalgia_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/zamiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/24951402956.pdfIn PDF document text
    • http://beguresenoraw.epizy.com/ssc_mts_delhi_admit_card_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/vezixekelagegafarenipoj.pdfIn PDF document text
    • http://nubimopupugu.rf.gd/farm_animals_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/ozone_layer_depletion_seminar_report.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_off0000be0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0A 5284 bytes
SHA-256: 09fc8f8531ff961ba50b5b8d918ef47781cfa7046c516d298aa5dab1ec7c6fd2
font_01_sfnt_off0000d00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00F 10156 bytes
SHA-256: c666ae090e6dc9697cef1476a98adba8c8b4af329bf594381e98aef760b25069