Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8364c28e39c256…

MALICIOUS

PDF

76.1 KB Created: 2021-02-12 16:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d41509fe30e7d25aa1145f6bd82f22c6 SHA-1: 70b9b3b01beaacbf22c9da9efdf14a3eaca7b4bf SHA-256: 9f8364c28e39c25602eafd7fd051e59ae654cbcdf735a271c08babf8c64622fe
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://jacksth.ru/123?utm_term=what+is+a+word+splash+activity PDF link annotation
    • https://vegekonewipure.weebly.com/uploads/1/3/5/9/135964828/6db79d353a755.pdfIn PDF document text
    • https://wufijoduk.weebly.com/uploads/1/3/2/3/132302847/c1f98cb.pdfIn PDF document text
    • http://pubguckazan.com/commercial_cold_cut_slicerdzmoi.pdfIn PDF document text
    • http://mamontov-net.cc/freshwater_snail_care_sheetckpah.pdfIn PDF document text
    • https://xuserufibizu.weebly.com/uploads/1/3/4/1/134131258/e98aeb9ef7d2.pdfIn PDF document text
    • http://avit0.pro/double_gun_shoulder_holster_for_saleb5525.pdfIn PDF document text
    • http://batut.space/spongebob_chase_music1aeoj.pdfIn PDF document text
    • http://zinobinipote.22web.org/fegisafameza.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/9173090.pdfIn PDF document text
    • http://natikolom.site/cancel_cbs_full_episodes_and_live_tvuxta1.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/dipafuxe/employee_assignment_schedule_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/pufebalijedetaxuvedu.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/wrong_turn_5_movie_bolly4u.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/glow_party_flyer_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/lewebowuwaligagiw.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_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 5428 bytes
SHA-256: c8241f88279424c6627d81b1e24df2fd1adf33d5f8f9638d84447a55130dd52f
font_01_sfnt_off000100ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EC 10136 bytes
SHA-256: 3dace47764bc2acb74cb10c02fa2233637acdb86ab19db4512c67ea1db678f1d