Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a7af9ed3befb91…

MALICIOUS

PDF

54.0 KB Created: 2020-10-10 01:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2b82b2cc6d00bef6706e3d538b8444cf SHA-1: 9b2eb5c773fcc53fece22aebbaa01b9d5b6e921f SHA-256: 62a7af9ed3befb9161541cdc59d98da927752e199b4644bada3bddef6cc45bd7
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=baby+einstein+lullaby+time+dvd In PDF document text
    • http://files.globalrelocationsolutionsinc.com/uploads/1/3/0/8/130814225/tupiwimeximuxig.pdfIn PDF document text
    • http://natix.bs.shenfieldlearning.com/uploads/1/3/0/7/130775990/8d33502a.pdfIn PDF document text
    • http://files.kypriaki.ca/uploads/1/3/2/7/132740494/f1f5be.pdfIn PDF document text
    • http://kimowisu.mygcstm.com/uploads/1/3/1/3/131378932/befonafimofa_gavituxakikepe.pdfIn PDF document text
    • http://files.talonmedianetwork.org/uploads/1/3/1/3/131384076/rogozobumubelume.pdfIn PDF document text
    • http://sokoj.mcldanville.com/uploads/1/3/2/7/132712129/gamukodibize.pdfIn PDF document text
    • http://files.sydneypaintinggroup.com.au/uploads/1/3/0/9/130969129/1063071.pdfIn PDF document text
    • http://lizalal.rachelhenson.com/uploads/1/3/1/4/131453960/wimupibixozotet.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/1/0480/4100/1119/files/walmart_return_policy_tv_after_90_days.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/51802489136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0026/1540/files/89196117981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1258/3334/files/265_area_code_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/great_midwest_conference_rugby.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3783/6710/files/harrison_bergeron_reading_check_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0498/4474/files/quadrilateral_attributes_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3853/8908/files/unix_systems_for_modern_architectures_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F7 12056 bytes
SHA-256: 4a271f8ebf9e53c0e9f7c0c2eb12693d81b464f3d74fa49007eba170bcfc3612
font_01_sfnt_off000088e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E5 5000 bytes
SHA-256: 39e52b7c08e72c06f5c827fb5ffb0bc160245289d35dd76ab2918b130ce9f062
font_02_sfnt_off000099cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99CB 10124 bytes
SHA-256: 7b9162b4aac1f77d0e86b34c9dfdde10ce8270936b0c584685b20f19b23d411b
font_03_sfnt_off0000bc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC65 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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