Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3f456b80b00274…

MALICIOUS

PDF

36.6 KB Created: 2020-10-09 06:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8a5db440c42a9b80a7284c9c9f10125a SHA-1: b569433f2d1376c408a422fbeb71e1fb22b2debf SHA-256: bc3f456b80b00274f125217ef9246c899c25242409b636a244d1a01ae75d6ed5
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://ttraff.club/pify?keyword=college+physics+a+strategic+approach+instructor%2527s+solutions+manual In PDF document text
    • http://files.washingtonccd.org/uploads/1/3/0/7/130738836/7b17b66.pdfIn PDF document text
    • http://zebutaweb.dmcihomefinder.com/uploads/1/3/1/6/131606731/8782797.pdfIn PDF document text
    • http://sudizewa.stephlovesfitness.com/uploads/1/3/1/6/131606346/3160142.pdfIn PDF document text
    • http://lovojo.brokenbayparentcouncil.com/uploads/1/3/1/4/131437087/2044926.pdfIn PDF document text
    • http://files.kidschangetheworld.org/uploads/1/3/0/7/130739776/563946.pdfIn PDF document text
    • http://fafeku.capoeira-aca.com/uploads/1/3/1/1/131164250/2030922.pdfIn PDF document text
    • http://wiwipas.fbcrecreation.com/uploads/1/3/1/4/131409167/josigivuzedepezadu.pdfIn PDF document text
    • http://files.ecclestoncthinktank.com/uploads/1/3/2/8/132815298/tenopefegazim-miwipopi-rigapojovaxi.pdfIn PDF document text
    • http://biparof.perthcoffeeworx.com/uploads/1/3/1/6/131606279/mibun.pdfIn PDF document text
    • http://zodinimo.balerno-communitycouncil.org.uk/uploads/1/3/1/4/131407588/2a394c4a3ed5.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/1/0482/8210/8065/files/ikea_night_light_singapore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5299/0103/files/36412712574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7225/1814/files/yanita_yancheva_diet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0001/7318/files/cc3d_revo_gps_setup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5553/7064/files/blue_whales_near_extinction.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_off000042b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42B7 5388 bytes
SHA-256: e4f2de7e107d320543e7ee80f7e99602494ffafb75aff9c68d3ddb8324e57778
font_01_sfnt_off000054f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54F2 9800 bytes
SHA-256: 34ee96f22ec92870e6a58f1c24bc55b3d15b4d92954127af0ffd53d9ae3ff23b
font_02_sfnt_off00007673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7673 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378