Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c664f590b0ad77…

MALICIOUS

PDF

42.4 KB Created: 2020-10-29 18:57:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d6062f84cf8431ca797a9c102f0d8c90 SHA-1: a47de317909ff960512b14203bc1be215b445935 SHA-256: e0c664f590b0ad779472555a5a88fec7b722422a0a8b00a6ffa0b76bd4ddeef7
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.link/123?keyword=my+ip+hide+crack+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414491/normal_5f945fba93888.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/zitodosutuwo.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/1376720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_5f9839e99592f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5f9330117074a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5f8cb133adc14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f92544fa74e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000591e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000591e.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00008eef.bin)
    • https://uploads.strikinglycdn.com/files/6780254d-7606-496b-bb0c-c2c5f98f4106/83553916048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6174/6099/files/cash_flow_to_creditors_increases_when.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/kenneth_frampton_modern_architecture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa641ea6-696e-46bf-a6b2-e60017157b30/20313545561.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_off0000591e.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000591e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x591E 4612 bytes
SHA-256: b13c4d825cc3dfffdb0ca85f9a84e208fb07ba24a78ac506f243654b88c3f7a2
font_01_sfnt_off000068db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DB 11244 bytes
SHA-256: 3773f9365d28dcd2a7353eeeef6d4a16007f20412707ba87a4a19b01800bb2c2
font_02_sfnt_off00008eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333