Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d3ceb494621504…

MALICIOUS

PDF

71.1 KB Created: 2021-02-17 17:51:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5da3babf1918342fbcbf723f959ded5f SHA-1: ea5a98bf1d6cfdeb6929c573642213f59edf51de SHA-256: 12d3ceb494621504512377b00e3e19506ff53b05e0c854cfa11948ed4e10cf58
314 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/wix?keyword=apk+stands+full+form In PDF document text
    • https://cdn.sqhk.co/xazakamugi/giGhahb/taken_souls_blood_ritual_free_download.pdfIn PDF document text
    • http://zewenidasi.iblogger.org/baby_booties_knitting_patterns_to.pdfIn PDF document text
    • https://rukufutuseju.weebly.com/uploads/1/3/4/7/134748195/pedaj-mafivipafu-zilipalaruruke-jotoroto.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/fuzopizunu.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujonad/TpEvHBY/horizon_zero_dawn_review_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/medukukekuke/hdjihbG/66723214952.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/IidiiGh/skyscraper_room_escape_trophies.pdfIn PDF document text
    • https://cdn.sqhk.co/xetokive/DXJjdhb/transfer_news_twitter_chelsea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tekaxipi.epizy.com/73594807038.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/channa_mereya_movie_ninja_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/maplestory_training_guide_2019_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/tenevavoda.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/audit_trail_report_example.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/2969885980.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/66742123422.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/huangshan_tour_guide.pdfIn PDF document text
    • http://jewabavetedow.epizy.com/68673636906.pdfIn PDF document text
    • http://vuzoziwulof.epizy.com/bitos.pdfIn PDF document text
    • http://silapopo.epizy.com/nidak.pdfIn PDF document text
    • http://sidiwen.epizy.com/56441373458.pdfIn PDF document text
    • http://tijunejo.epizy.com/60345641363.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/informacion_nutricional_aguila_60_cacao.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_off0000d922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD922 5240 bytes
SHA-256: 4d9fb5414e84149a3939518e9d812ef2b6e14a7af94da2b5fafe157da8f3f2e0
font_01_sfnt_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 10604 bytes
SHA-256: e9d0dbb1e265df81b006f2b000f049ada6013263886cbc63fa751c532ec04cc1

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