Malicious PDF — malware analysis report

Static analysis result for SHA-256 644e9c486c7b3322…

MALICIOUS

PDF

70.5 KB Created: 2021-02-26 15:59:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 493b4ecd1866e8fc26a47b8ec4a54810 SHA-1: 8431c654d8df20b1df7f69cb35011a6e29aef195 SHA-256: 644e9c486c7b33222b50aa6ace85aa7ab3924771256abcd771ae9fc78ad44516
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://dugedepap.ru/award?keyword=youtube+audiolibro+el+amor+en+los+tiempos+del+colera PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476140/normal_5fe15232d41a1.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/what_are_the_symptoms_of_a_bad_injector_pump.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/Egeigjc/notorious_jumping_frog_of_calaveras_county_analysis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476421/normal_60041d9726549.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466151/normal_5fcf4117b4664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419827/normal_60240ada2c52e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_6029e42a45225.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/edjbQjf/88463542307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453575/normal_60128aeeb6651.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/16315408191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411480/normal_5fe3c57c3af38.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/ibCDggf/wejebigufexokuged.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/agjcNhc/36275216042.pdfIn PDF document text
    • https://cdn.sqhk.co/sakixowofeg/ZhbwPaD/best_love_ringtones_2018_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417314/normal_6012e29337779.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/jhsgfgn/directv_losing_channels_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawerudarasikow.myartsonline.com/samsung_s4_mini_display_defekt_daten_retten.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/best_astral_projection_books.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/movojed.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/85456838206.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/zopasezuribetafom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABA 5320 bytes
SHA-256: 6cbe05371c47ffa2ef43f794a47ec53383cdd2882e6460a5ef2ca4acc1c76f7a
font_01_sfnt_off0000dcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAD 2700 bytes
SHA-256: f23b418b2a34a2400d80e995ab779c6f7e23a2f60aa5d91c3425da69a22d2a95
font_02_sfnt_off0000e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 10992 bytes
SHA-256: 6b331a8b802be88a589f2266208904879a9bef4bb5acc9e3cbe1f1e32911ce5c

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