Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a2b4dcd0afd82d…

MALICIOUS

PDF

34.7 KB Created: 2020-11-02 21:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3ac5374f08dca7ea65111d01b00f98c8 SHA-1: c10a3a5c5e2a9b8bfeb9dc6c4dbc93e9add305b3 SHA-256: e3a2b4dcd0afd82dfa8289f68572612dee4909031a1ff7c5411c906fa1ec791e
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.me/pify?keyword=google+docs+online+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5fa031350b9e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f96f84853429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f87ddf94a682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f950d85cfc19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f8e9da8c53b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f9893e8ab417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_5f9e8b932ecfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f90cf29dbe99.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/8539eb2e.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/vugamufijo.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/tubimejokulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7578/8700/files/fopiluzonoputuzedafoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1541/6219/files/all_shortcut_keys_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8991/1196/files/konukatujimidikokozerew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8627/5272/files/word_whizzle_at_church_answers_geometry.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_off00004a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A21 5008 bytes
SHA-256: 3b83583ac66406d4fc4b4b53431e1398e0ea3a0099894cf0f97235f5c156b28d
font_01_sfnt_off00005b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B44 10304 bytes
SHA-256: 9b0e18bce919ab7de9b026b7d8e64525bb4e45bbcec70e9997a7a28b644c4773

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