Malicious PDF — malware analysis report

Static analysis result for SHA-256 18be2c9f0c85e916…

MALICIOUS

PDF

68.1 KB Created: 2021-02-22 16:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b0d68332a1a414e42beaf30649c5da01 SHA-1: 5e6bbae83e0a973566c18af7bd003efd33467405 SHA-256: 18be2c9f0c85e9164b253fb08ae263135f10abf44c517063f655e25081f92f12
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=nutribullet+rx+extractor+blade+uk PDF link annotation
    • http://crubr.space/536587723750xmjc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ff6b1905a24d.pdfIn PDF document text
    • http://musc-media.xyz/brown_s_nautical_almanac_2017vcz7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5fe2cf32c885c.pdfIn PDF document text
    • https://cdn.sqhk.co/faresawuf/gHhfw9q/hangout_something_meaning_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_6010c4b7c275f.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/CWjcuib/twisted_tea_alcohol_content_tall_boy.pdfIn PDF document text
    • http://lnstagram-office.com/45294898591i79bw.pdfIn PDF document text
    • http://circus.market/harry_potter_monster_book_of_monstersoqpde.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/jizubisetebof/rekizusivokerosaku.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/87582797089.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/12_steps_of_aa_list.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/tedusunovokilirefavi.pdfIn PDF document text
    • http://xemozaso.rf.gd/rizujun.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/bodak_yellow_remix_free.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_off0000cf67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF67 4996 bytes
SHA-256: fe70eb048171a120da0be8433765a05b9cfe9f68b4c84140a969ed3e30a320cd
font_01_sfnt_off0000e077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE077 10216 bytes
SHA-256: 7233990f64d2b8fc4875e673c49cf9bdfaaa5ffdfa6a1a862001e1b520ade1c2