Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d768dcf65890a8d…

MALICIOUS

PDF

70.5 KB Created: 2021-02-15 14:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3b6c131907c54d7c8168964e176fe230 SHA-1: 959621a6ec95af4e5a64b3e081c8a72d81f18af7 SHA-256: 0d768dcf65890a8d6ae667ad518faf12059594401a5ae56625b5d0c4448506c5
244 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.
  • 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=school+bus+worksheets+for+preschoolers In PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/fozebexab.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/ikjfghR/xujatefarosurekaso.pdfIn PDF document text
    • https://wakukaxowemaba.weebly.com/uploads/1/3/5/3/135303752/7ca921582.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/IigjiOa/tejux.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/FjeidgW/anime_wallpaper_phone_dark.pdfIn PDF document text
    • http://prizyivnik.ru/3200712283358rx6.pdfIn PDF document text
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/xokepekame.pdfIn PDF document text
    • https://cdn.sqhk.co/tesigasefaxe/i1UjgCW/canvas_student_login_pcsb.pdfIn PDF document text
    • http://ygrash.website/46976521590v53t4.pdfIn PDF document text
    • http://load-bcp.com/ielts_listening_sample_testsxmnv.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/07d1a7.pdfIn PDF document text
    • http://swiss-gear-top.xyz/70623291439e6f5e.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/dazinibonofobi/kufewipobarovo.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/vowipunu.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/bhojpuri_video_dj_song_2019_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/44008394760.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/sebevavo.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_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 5292 bytes
SHA-256: 1c702d7b2c2faa47637dcc5bb387281b4877d5e9fc0438f416845cfc015223ba
font_01_sfnt_off0000ea19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 10180 bytes
SHA-256: 59b9ea01a9fcb0202f5648319f33b70e91d11c5c5aade70bafdf4b5a206accae

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