Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b053f2b7880105…

MALICIOUS

PDF

44.6 KB Created: 2020-11-03 08:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fe0b70470e0325a97c88d8307384b5e2 SHA-1: 8e52512f3193edbd6c05bd39bbd09246da1861ce SHA-256: 76b053f2b788010504feae1ff8b6d8ed4cda008414b11de7fb77e41d8ce5460d
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.me/123?keyword=gb+whatsapp+download+apk+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5f9817bc38536.pdfIn PDF document text
    • https://sipasegeremiraf.weebly.com/uploads/1/3/4/4/134404187/5815598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f9228cfcf2e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f89e58172b66.pdfIn PDF document text
    • https://sotodivejezaze.weebly.com/uploads/1/3/4/3/134391575/pazaxenapojili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f96e6329c28f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424364/normal_5f9ddc4382971.pdfIn PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/nuwamepuwuxegu-roxawozijujuwe.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/6ec94.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/241df73c-039a-49ba-ad39-11fa9e225e35/23278838128.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/345563459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0105fac-3baa-4c3c-99a3-0d5993ab7e1e/wigezorufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ec1055-eb92-44d7-98e0-9bdb48d71b66/61106192101.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_off00006fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB2 5376 bytes
SHA-256: 3f19962722d449dadf5dbe45260cb92ac7e233b762998feefeec4a16ca859077
font_01_sfnt_off000081ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FF 10612 bytes
SHA-256: 72e2be4c58504b972e8b79289528d2ef145c893d395b23e2285d54a70e5e82b3

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