Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8161f168c295a3e…

MALICIOUS

PDF

68.4 KB Created: 2020-10-25 12:07:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 666aef31555f4d9a6d90ed9820ef2f02 SHA-1: d3f9b865a413cf16875ba7bbd671e7435f253393 SHA-256: b8161f168c295a3ed9f5d5deecb5984e8b884f4e5a8ec3435ad86dfe1354e5f3
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.cc/pify?keyword=maccabees+1+%2526+2+pdf In PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/ledega.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/f1400cda.pdfIn PDF document text
    • https://vodoxakitukep.weebly.com/uploads/1/3/4/3/134335140/7445605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5f89a3d64a079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f94ab4b1f645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f9059759df00.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000d007.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000d007.bin)
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/que_es_la_distraccion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8670/3512/files/turtle_beach_xo_four_stealth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7730/0124/files/23733587229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6006/7991/files/commas_in_compound_sentences_worksheets_5th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/34595424256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7398/2630/files/11585851535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3675/2037/files/honda_foreman_450_es_manual_shifter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddfe126-e5d9-4c0f-8a93-d26fa1d25c97/kofojosabonoxaxof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02cc386-7647-4026-b417-0aab4533c122/fawubarijumoxosu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/bajada_de_cargas_ejemplo.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/cause_effect_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/law_obligation_and_contracts.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/18142403649.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/citation_styles.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_off0000d007.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD007 4860 bytes
SHA-256: 7383e03d93b5159663793652cd013b70ce2661e138440bfc9d5cf1b2a40df2fa
font_01_sfnt_off0000e0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A8 10836 bytes
SHA-256: b231082aeb2bdf8c64e127ded4fff677c1725bac6b224221b76755db81ab4075