Malicious PDF — malware analysis report

Static analysis result for SHA-256 c194b59fb1c4f0ff…

MALICIOUS

PDF

73.1 KB Created: 2020-09-26 22:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d6c81aa4bc4f3a0c34c45aba19bd5d3d SHA-1: d419ba614e3f23807373d90c12625a56af8bd4e6 SHA-256: c194b59fb1c4f0ff4d524567fd0588e72313bc9265de7fd65de461c9dcb310a1
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=the+republican+playbook In PDF document text
    • http://files.kathrynholzman.com/uploads/1/3/1/6/131636807/5fc98d6.pdfIn PDF document text
    • http://files.colonialridgegolf.com/uploads/1/3/1/6/131637257/xodabolil.pdfIn PDF document text
    • http://files.rockcreekgoldenirish.com/uploads/1/3/1/8/131856907/bozareneve.pdfIn PDF document text
    • http://files.tuval-mashiach-psychology-biu.org/uploads/1/3/0/8/130814515/subamenonelax.pdfIn PDF document text
    • http://wujejex.mercedffa.org/uploads/1/3/1/0/131069839/lizafigevegu_nolor.pdfIn PDF document text
    • http://files.carterplantationhomeowners.com/uploads/1/3/1/3/131398288/nidolosafexenal_papukukurejix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/32421801129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2823/3883/files/lavetetapakefadixop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6504/1308/files/77606922781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6660/5209/files/nalemiminupivadezikuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/62630990594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/3274/7672/files/bunk_d_episode_guide_wiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/bakubifivoboj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49B 4900 bytes
SHA-256: 5b1dcd0890a3524b1df3ceab75698780693e46f21add17ae6ac24200ba4410e9
font_01_sfnt_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 10604 bytes
SHA-256: cb22bf3de0611f3e841306cfae4674d9323a2c11a3a749f1e47def31a53ecd8e
font_02_sfnt_off00010948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c