Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e02eb61a4359e6…

MALICIOUS

PDF

42.0 KB Created: 2020-08-24 14:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8849f5af58c193993dd29131c02fe55d SHA-1: 672af688ea65917a831a321052e3e1c79bdb9f65 SHA-256: 42e02eb61a4359e632416fc678f28f24cfaabd35a4ba9fea13f900f01a3f581b
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.cc/pify?keyword=ap+eamcet+seat+allotment+2018 In PDF document text
    • http://figufuko.piotrzuylansky.com/uploads/1/3/1/4/131437464/wilimaduzo.pdfIn PDF document text
    • http://vixowif.acupunctureonsaltspring.ca/uploads/1/3/1/0/131070197/gekenupunofu.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/1/0432/4383/1464/files/12346555078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/bekajigipafakaxokagomuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3363/9584/files/rto_driving_licence_test_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/dapesukevofekexewavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4171/6389/files/37386390199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/34990783295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/bunegunipisemabedumuponez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7321/5387/files/fishing_report_greers_ferry_lake_ar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/iphone_11_pro_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/61773160300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.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_off00006520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6520 5492 bytes
SHA-256: 3902d07dcb98fa897c0ec839641be658edb5dd1e7de0219020806c701f2c06e9
font_01_sfnt_off000077bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BC 10304 bytes
SHA-256: 49ea43453e87fe1c002c6a9b321b9b0c705fba742c4358ef3df87d554d3b4677

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