Malicious PDF — malware analysis report

Static analysis result for SHA-256 b552f9bcb42b0aee…

MALICIOUS

PDF

74.2 KB Created: 2021-02-14 06:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 191dab45c42f2168f44c6d3cc63d949d SHA-1: 27a02d6787281c715f1bc950d2b24e11c5f33413 SHA-256: b552f9bcb42b0aee266e702e1af1bbd35d6a05d0a115d0ff3608789cd07f16ce
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://jottigo.ru/wix?keyword=pro+football+positions+abbreviations PDF link annotation
    • https://cdn.sqhk.co/tumowara/Wghc7je/bapezanajoxisusap.pdfIn PDF document text
    • https://sipesavuw.weebly.com/uploads/1/3/4/6/134697333/3862978.pdfIn PDF document text
    • https://cdn.sqhk.co/sixatowitur/jicicic/ruzugegireni.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/1BYihhh/strategy_and_tactics_ww2_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/d0vhawO/soccer_coaching_tactics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408871/normal_60012194bd407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_5fd350702f3af.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/92ODggP/hungry_shark_world_hack_app_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fufagarafe.epizy.com/hunger_games_book_report_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/git_sourcetree_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/kivubujeduwatuzexodawoxal.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/kifevazopin.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/folder_structure_template_sharepoint.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/tabloid_vs_broadsheet_ppt.pdfIn PDF document text
    • http://rimalapotozuf.epizy.com/arabic_model_english_fonts_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_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 5096 bytes
SHA-256: 51757064eab106fb0dc558650854ba170446279a2ed74348e18bfbbdb1e68062
font_01_sfnt_off0000f6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DE 10904 bytes
SHA-256: 0644298ff211edfc5fd04bfd89c38bddf8dfe60354af65fda77128b73d306d15