Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6d7120fd589c5d…

MALICIOUS

PDF

59.1 KB Created: 2020-10-12 00:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 43558c48dc01815d1f33a3edfdfb8f63 SHA-1: b9701f0b0c6bf7e677d57d41f5809ff46af7bad3 SHA-256: 4d6d7120fd589c5de03fcb001a3c431c24ceb257ef37ee6741229a3f49a77ece
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://gettraff.ru/strik?keyword=formulario+calculo+integral+y+diferencial In PDF document text
    • http://files.icctexas.org/uploads/1/3/1/8/131856190/3b19a0e94a40241.pdfIn PDF document text
    • http://files.robynveal.com/uploads/1/3/1/3/131379248/loguvari.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2170/5631/files/arab_scarf_face_mask.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9636/2148/files/lojotirukavurebako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1772/6883/files/25041260959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7770/6943/files/vendredi_ou_la_vie_sauvage_tlcharger_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0601/1809/files/excel_sheets_cost_estimation_civil_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1909/8523/files/state_of_illinois_new_hire_reporting_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2576/3989/files/wurm_unlimited_blacksmithing_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4485/8787/files/las_mujeres_que_aman_demasiado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1527/4147/files/great_northern_war_uniforms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4915/9322/files/gotubupomowovikagez.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E4 5220 bytes
SHA-256: b9af4e44116813f31277d8189773e19ad98a10c44df2d7732a3c4c8027af8868
font_01_sfnt_off00008793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8793 19004 bytes
SHA-256: 0d17d25c802ee0796e92e07d3921759f39accc70a52994697135c4c77bafa6a0
font_02_sfnt_off0000c2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F9 17380 bytes
SHA-256: 07084713ffcf4caacaaf638358eaae12b7c646c8d2fff438ded4bb0ab073d2b5

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