Malicious PDF — malware analysis report

Static analysis result for SHA-256 a886076a5b823cf3…

MALICIOUS

PDF

72.5 KB Created: 2021-02-25 11:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1a65981b245db5937fd73ed0f507407b SHA-1: 31ca68d25d80f5fbec1e5d7542bc0ffba373a1ce SHA-256: a886076a5b823cf30e8346e1814f108608326947a81f5e84715f834b38779e3e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wix?keyword=comparing+and+scaling+investigation+2.1+answer+key PDF link annotation
    • https://cdn.sqhk.co/jebumujo/WIVgchg/zombie_run_hd_mod.pdfIn PDF document text
    • http://dodemawaj.iblogger.org/83842081757.pdfIn PDF document text
    • https://murunabijijot.weebly.com/uploads/1/3/5/4/135401069/wutojopudu.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/421516.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/jfqTPIk/zombie_defense_tycoon_wiki_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/eiF5T7k/mafelifa.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/ZFeiejc/jezapopo.pdfIn PDF document text
    • https://zovarufegurer.weebly.com/uploads/1/3/4/6/134625168/8649101.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/55d579c73b13151.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/ejggNhf/resident_evil_movies_where_to_watch.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/icWhjie/soap_cutting_satisfying_asmr.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/ggixEgi/75936110220.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/kikunojulejuj/smart_av_antivirus_free.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/rixojufikavis.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/19986336155.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/cost_budget_management_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/uncle_bob_books.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/xuzatip.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/printable_math_crossword_puzzles_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/42556262252.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_off0000dde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE7 5832 bytes
SHA-256: 5743ec4b51076fd92347e05400ab6e41b7eaec1c640186cddc1eb36f1dec95dc
font_01_sfnt_off0000f1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D3 10184 bytes
SHA-256: 255e33ea795f30d22dab2df8708a21b26cefc6b5b8fd27f2d9b994de928d967a

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