Malicious PDF — malware analysis report

Static analysis result for SHA-256 264c84e567b40531…

MALICIOUS

PDF

68.1 KB Created: 2021-02-07 14:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: aa5297344e6550b07c02c24be079d5cf SHA-1: dafb8bda4df192f80d64fc2a3510032d2085aa26 SHA-256: 264c84e567b40531832af904fd99634406588a2f58b676d5b3cc728ee3ee4be7
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://druttle.ru/wb?keyword=999%20camera%20best%20filters%20app PDF link annotation
    • http://braco.ru/sandwich_maker_3_in_1_lidl4ghtw.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/1201854.pdfIn PDF document text
    • https://wixinuwexe.weebly.com/uploads/1/3/0/7/130739185/rapaxuzewurozem.pdfIn PDF document text
    • http://rrrrkkkkk.space/upstream_student_s_book_b2_answersuv1xo.pdfIn PDF document text
    • http://konufij.22web.org/770987996.pdfIn PDF document text
    • https://nefarixuk.weebly.com/uploads/1/3/1/4/131407944/figibaxegexazo.pdfIn PDF document text
    • http://clientesdkb.com/52919515393izw61.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/tozaduliwubega/maquina_lavar_brastemp_11kg_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/60777002359.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/crazy_stupid_love_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/all_spices_name_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/95173195006.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/cover_letter_template_for_medical_administrative_assistant.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/hegarty_maths_answer_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/5122254055.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_off0000cd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2F 5360 bytes
SHA-256: e347cfad436f2bc329693ccacf7ac138152e45247203757a8ec61ab758b10f62
font_01_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 10736 bytes
SHA-256: aa3266281f99c0235637183228513d086f71bfc380f032f2cbb7d1fd9fae6be3

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