Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37250f392306742…

MALICIOUS

PDF

70.8 KB Created: 2021-02-17 08:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 602c044815cc2fff941dbc8a83ca7cf5 SHA-1: bc1ed1c57076832af23e1f90ad0f0880e1b4cb9b SHA-256: f37250f3923067423b6fc9fc7d4c53b9fb909982bd2d6cb65acba6795d24e0c6
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://crophysi.ru/square?utm_term=can%2527t+drag+window+to+second+monitor+windows+10 In PDF document text
    • http://freedate18.xyz/heroic_kingdom_conflux_path887u7.pdfIn PDF document text
    • http://nudistoff.club/car_driving_2_mod_apk_download0ym04.pdfIn PDF document text
    • http://siteznakomstv69.space/xewove8r4ga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486521/normal_6007545219c77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369794/normal_5fddf62e01ca6.pdfIn PDF document text
    • http://wide-mean.top/car_wash_fundraiser_flyer_template_word1gfzt.pdfIn PDF document text
    • http://shtangye.xyz/child_of_mine_carole_kingczx6i.pdfIn PDF document text
    • http://glasshookahcatering.com/fish_lips_kiss_heeliymv4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461202/normal_6005dc16a5c6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451929/normal_5fe43d01dd8a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420030/normal_6019a6a174ed2.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/fobupojowojon/bully_bullworth_academy_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/27263944194.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/cdc_travel_information_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/new_hd_movies_english.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_off0000d7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DE 5452 bytes
SHA-256: a980b227b549d643d07d83b3897c80589659e7774ca34f44e1ab3ea758e340b2
font_01_sfnt_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 10404 bytes
SHA-256: 4779b1b90008379621a6d227d22d4358132a1cc40fffa88fab0d075615016209