Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dda899be49da6f5…

MALICIOUS

PDF

76.0 KB Created: 2021-01-20 14:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1cdcf49d0c0931cf33adb3db069225a0 SHA-1: fac89dfdc4542cacf560dc5633769e3326839200 SHA-256: 9dda899be49da6f52fa0d3fa4f2655a690bb451b3f20686ac1d5db24e60a0ebb
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/wb?keyword=free%20slot%20games%20for%20ipad%202 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4448719/normal_5ff4c7c64cd37.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/jid0DVx/guvalepes.pdfIn PDF document text
    • https://sefusozikoju.weebly.com/uploads/1/3/4/3/134366316/ruvafebukabi_wamenagomajewer_nugunino.pdfIn PDF document text
    • https://cdn.sqhk.co/xalurubizud/SA6C2ue/international_business_salary_bachelor_s.pdfIn PDF document text
    • https://jiwalevimube.weebly.com/uploads/1/3/4/8/134870165/5672696.pdfIn PDF document text
    • https://cdn.sqhk.co/figotabam/E8A2jag/wipodi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368466/normal_5fdd7acb1b29c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403679/normal_5fcd09d918da9.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/dvjb6MQ/the_solar_system_formed_from_brainly.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/fXggiiK/23021293576.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/xoU2Ggc/play_online_tennis_games_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/eheBjjG/44359082197.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/gaidAgd/82688021088.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/igugdRF/counter_terrorist_strike_3d_mod_apk.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/jexijer/gerunds_worksheets_for_grade_6.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_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 5448 bytes
SHA-256: 9fdabdbdcd5f73603620c14c6b5d3c84ac51a2f7f2806694c7374dae4a97a260
font_01_sfnt_off00010042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10042 10236 bytes
SHA-256: 17edeb9c772c5db4d65bd6752130d008bb76617d90099905062ec374b0d124e2