Malicious PDF — malware analysis report

Static analysis result for SHA-256 acdf7142f06261b2…

MALICIOUS

PDF

43.1 KB Created: 2020-10-26 00:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: e1ef5bc3a98c4f925d728d9cf4908296 SHA-1: 79962899912143ff34c788926233071a20f429ea SHA-256: acdf7142f06261b2030a6b903c399de1e4b7b1ac00382e3c3e3d23a5abe32df2
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/aws?keyword=dance+with+the+devil+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f9353e788d5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5f9216b61bdb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376127/normal_5f8b9deda85ee.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/liner_bepekefovuzow_mipudu_bajit.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/6248906.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/5e8d256f2b.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/texil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f905d2d1e2a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f8a20411db3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5f8a7b1580ea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f9077ca0ff9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5f8d3540c82f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb83a72-73e1-447d-befc-17c60b7265dc/assassins_creed_odyssey_daughters_o.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60988859-fe3c-4542-bd60-b8ab654fbd1f/watch_over_the_hedge_hd_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b51a34a-34a7-4723-a286-3c083722e581/wexaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353b7989-d86b-49cd-813c-fddaf7be9e5d/jimaritikorojipixutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b7317c-fab5-49a7-acf8-096cd2565c95/15421551471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3361b144-ab71-4185-9857-e026e3342fb7/1633167445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/719af8c5-c6ad-4c62-a4e1-0976490595ea/xixolapun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5255/6184/files/thuricide_bt_caterpillar_control_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9126/8262/files/saucony_kinvara_9_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/2193/9100/files/32444954407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/triangles_and_angle_sums_worksheet_14.5_answers.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_off000069f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F1 5324 bytes
SHA-256: c8077f29986d91908a09a69d9950a43964737dd90329685762c85ca351bb07f3
font_01_sfnt_off00007c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C20 10328 bytes
SHA-256: 1d1fcbf427f5468939a0ab0d3113a8d83f44621f111d07fbe124681bfa9177eb

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