Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d342e3a9f71160…

MALICIOUS

PDF

42.1 KB Created: 2020-10-26 15:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 0e0376b373b499037c99d34f657ba9c6 SHA-1: d416cefd9d070f409c733eccaf26387b0e8edb4d SHA-256: e8d342e3a9f711608f47a53b70d157934b9472b2c8cd673bb8968dd0ab1021a0
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=aiag+apqp+manual+pdf In PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/c107d04e.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/leguv_puxukukinedofi.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/kofiba_xasunifadi_fiwafedibojoti.pdfIn PDF document text
    • https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/zisore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f8945aa20f18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f8c898097be8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_5f911479ec91e.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/puwesit_beguxufenixiro_witapizaz.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/lumegitapoz.pdfIn PDF document text
    • https://farupixin.weebly.com/uploads/1/3/4/3/134314126/zafulinasusosod_jadedebuxe_zokidi_femezaroxamimu.pdfIn PDF document text
    • https://tedinuvade.weebly.com/uploads/1/3/4/3/134348171/4445f07be4a975.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000057f0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000057f0.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00008d14.bin)
    • https://cdn.shopify.com/s/files/1/0501/9664/4016/files/android_sdk_tools_for_unity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/4963/0113/files/kreg_pocket_hole_jig_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6005/0092/files/ribbon_weaving_wreath_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/45846434594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d251d55e-7fb2-4830-ab39-bcf0e186e884/pisivifozus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ca8e4b-8671-4e16-a82a-143b44a01633/winoxile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b77f2ca9-2cee-498b-96f4-e888b23fd964/tusuvedalex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad9a342-0b1c-4652-a070-7928c31370a6/62921369842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1007a60d-c01c-479c-9410-9086c955d8d8/20222665491.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 extracted file (font_00_sfnt_off000057f0.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57F0 4776 bytes
SHA-256: 8498435755d2aa340fcb23b51a5ceeb08e8df08b5f89649b87d8a723b512f7b9
font_01_sfnt_off000067f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F9 10896 bytes
SHA-256: c098193fd257119783bfaf6c2fdfea7597b683d3c2253d366fa0bd8a59080e9b
font_02_sfnt_off00008d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D14 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3