Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1bf16b4cff9f43…

MALICIOUS

PDF

73.0 KB Created: 2021-02-18 02:12:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d5df121cf33ab484c577b9c7b39a5560 SHA-1: 5a5bc44d01022c8698c7b44ba4c2785cba9a9fb1 SHA-256: 6d1bf16b4cff9f43d05e083e7238c3c0f59ae13bb68567eba6426a4c14813772
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=106+geometry+problems+pdf In PDF document text
    • https://cdn.sqhk.co/tuwetebep/jdPygdl/warhammer_40k_start_collecting_primaris_space_wolves.pdfIn PDF document text
    • http://presalon.xyz/706224749528a39q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368488/normal_5ffabf446c5e4.pdfIn PDF document text
    • http://nncucuucuc.space/54656735898ppwwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484806/normal_60252f1d263ae.pdfIn PDF document text
    • http://starkrobotics.org/202172246021ra82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_602da106257d4.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/ihiew1H/nuzabaso.pdfIn PDF document text
    • http://5coupon.info/google_maps_api_key_free_for_testing0h3jd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476429/normal_600298c629fcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504839/normal_6025ff373f6cb.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/hdNS2ie/lobasurapavazego.pdfIn PDF document text
    • http://instahelpforbusiness.com/nissan_sylphy_car_manualfo460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_601d09c260918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461525/normal_602202022a706.pdfIn PDF document text
    • http://fazojum.66ghz.com/88168886434.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/Shi0gtb/pusujitaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vatapusaf.rf.gd/bokunazusojojasomidib.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_off0000de01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE01 5648 bytes
SHA-256: 02d84e22ae810f1ffce8d149ebb3c5fd35bcb154f5e5e3f64b5339c402a88e20
font_01_sfnt_off0000f12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12C 10476 bytes
SHA-256: 56eff30f4087b88e26da490d87e09e6375d4d4506184093cfdf2c987061456b1