Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c512c9f9e060d8…

MALICIOUS

PDF

68.4 KB Created: 2021-02-07 21:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 974644df2df8a7cfddbfef57dda89e40 SHA-1: e835bd7dea30e45718468d56a6e60a4f6b88d275 SHA-256: 27c512c9f9e060d84fdc2851a73e32753c77bb797b98a6c82ff25582e0be4ea3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://leonvi.ru/aws?utm_term=sql+format+phone+number PDF link annotation
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/5854823.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/lagoxuza_wixus.pdfIn PDF document text
    • http://girlsbeach.space/talking_tom_gold_run_android_1_comxf95h.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/8909684.pdfIn PDF document text
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/7e13a.pdfIn PDF document text
    • http://marketeuro.pro/gunship_shooting_strike_battle_hackm4b1u.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/mejados/greek_root_words_worksheets_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/jawedimonugadasoranenit.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/80841622602.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/configurer_mail_aliceadsl_sur_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/54683173915.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/97211007087.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/monaco_city_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/27813783165.pdfIn PDF document text
    • http://dezezefisimel.rf.gd/1967313104.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_off0000d07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07C 5332 bytes
SHA-256: 16c9d96847b60d7b15dd9fd7c6daf32c586abcbb056c84a3a1546828cd86c4d1
font_01_sfnt_off0000e26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26E 10092 bytes
SHA-256: 7ce13f71af2229609fbcfa8cc4697af38a01901eb085f1f9729d06f41b709000