Malicious PDF — malware analysis report

Static analysis result for SHA-256 d741b33bfb59b4a8…

MALICIOUS

PDF

51.4 KB Created: 2020-10-27 12:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: a3af5f905108cf7ad24c07513c19f035 SHA-1: eaaee3436446da8ea59c3c7dad4c610757ae6bf4 SHA-256: d741b33bfb59b4a803e82f7dbc21ac0cd239d909def81794126a727cadc2e8a2
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=at%2526t+white+pages+nashville+tn In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f873d8a4a19d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f8d6486cebfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_5f97ed08828e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f87f258d077b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5f8bcc9f691d8.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/17c1f8953c4.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/21a3cc752cf3.pdfIn PDF document text
    • https://gegakavawedo.weebly.com/uploads/1/3/4/2/134265750/rofimexikisobi_nelesivij.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/561c7fd99eb.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/9039740.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/3756296.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/vovasijutavud.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/649272.pdfIn PDF document text
    • https://pumewigegokofav.weebly.com/uploads/1/3/4/3/134317234/3378357.pdfIn PDF document text
    • https://vabejodero.weebly.com/uploads/1/3/4/3/134378136/wudijo_fotadife_sabizus_vowadezixezeli.pdfIn PDF document text
    • https://digulowewuw.weebly.com/uploads/1/3/4/3/134363346/mubamazufogakarudu.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/xusimob.pdfIn PDF document text
    • https://sufusazowuk.weebly.com/uploads/1/3/4/3/134311692/penuv.pdfIn PDF document text
    • https://rubazepenomul.weebly.com/uploads/1/3/4/3/134324915/desiwirewoki.pdfIn PDF document text
    • https://zenovoruzunej.weebly.com/uploads/1/3/4/3/134339910/9779446.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/96c100b1-3c99-4bf4-9479-cdf6b2a4f603/mixigelekirani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/916fc244-c045-4602-abac-1c3834549d0c/xezutotebalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ceffb8-de50-4c84-8565-1e6cc3861fbc/jalosakopubitime.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_off000089f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F4 4144 bytes
SHA-256: 3550e38f89ef5f73189962710b1604e049c059fe572906127735d2cce0902f16
font_01_sfnt_off00009814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9814 12452 bytes
SHA-256: 972bc82d1f33838176bb321671b5710bfcbf792ea03a7a0933c33d7d1ab568d5

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