Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7f9aaeab878943…

MALICIOUS

PDF

40.4 KB Created: 2020-10-04 07:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a18dd65c1152c88faff78fd7aa240bdc SHA-1: bdb5df12f1078d78de17e11daec02c6360cf3caf SHA-256: 0e7f9aaeab8789433c1d59ab878732457609c38185d61453caa5eef141a2ebb7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=brother+hl-+2170w+printer In PDF document text
    • http://fadol.geldersbewind.nl/uploads/1/3/0/7/130776407/8978309.pdfIn PDF document text
    • http://files.chloe-bee.com/uploads/1/3/0/7/130775971/beromudepax-lexugen-pivot-zozageterati.pdfIn PDF document text
    • http://files.acrossdesigns.com/uploads/1/3/0/8/130874588/3ee5b134f4.pdfIn PDF document text
    • http://files.editionslenfancedesarbres.com/uploads/1/3/1/0/131069886/werupaledinu_rekujoze.pdfIn PDF document text
    • http://files.greensouthirrigation.com/uploads/1/3/1/6/131606938/faac05057.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0549/9801/files/anatomy_trains_myofascial_release.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4399/0939/files/storm_of_steel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0730/9984/files/home_learning_year_by_year_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9970/1406/files/22_jump_street_poem_scene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0084/2400/files/monabibegeranukos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6821/9541/files/cestui_que_trust.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d448cacc-d46c-40a2-b594-b5e986fe17f1/9288670761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cbee58c-fb00-4450-869c-04e3523d6be3/bunone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64f497a-49c8-4c29-b87a-ab5e53b9886a/16299536087.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D5 4888 bytes
SHA-256: c0a511aa1cc958a814c02b8b60bbc469b4bf0b8cb15b36063fbdb76982a1cfd4
font_01_sfnt_off00006189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6189 10620 bytes
SHA-256: 36856dd147ae36c65fa5dc02be468d14021293205ba013a7ffcc8217baa732b4
font_02_sfnt_off00008586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8586 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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