Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c2676ab3fbfd32…

MALICIOUS

PDF

37.9 KB Created: 2020-10-02 14:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 66134d05362f88d13dbe21965e750dca SHA-1: 29026f1c5f5b903a67771af97e34493a6022ae5a SHA-256: f8c2676ab3fbfd32ac3d72cb77a246b37b58a78b7194d8346123a4233b0edc0f
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://gettraff.ru/strik?keyword=clinical+pathophysiology+made+ridiculously+simple+pdf In PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/gikozuzelas.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/migawokezidegolimirojepoz.pdfIn PDF document text
    • https://site-1039565.mozfiles.com/files/1039565/begisopafawamafukut.pdfIn PDF document text
    • https://site-1039731.mozfiles.com/files/1039731/35838074888.pdfIn PDF document text
    • https://site-1039431.mozfiles.com/files/1039431/nunexoguzulorizoropepilaj.pdfIn PDF document text
    • http://files.kevinberrybooks.com/uploads/1/3/1/4/131454696/b68c6fc7.pdfIn PDF document text
    • http://zapax.edistoislandyouthrec.org/uploads/1/3/1/3/131381886/xurisadona_runegagur.pdfIn PDF document text
    • http://xuxax.networkerstec.com/uploads/1/3/0/7/130776321/9989651.pdfIn PDF document text
    • http://refozozub.nohsfamily.com/uploads/1/3/2/6/132681821/8048417.pdfIn PDF document text
    • http://files.anygivenchildharrisonburg.org/uploads/1/3/1/4/131438477/1134647.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/1/0429/4760/8730/files/atomic_bomber_full_8.5_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/clash_of_clans_town_hall_8_attack_strategy_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7813/9556/files/rebezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8561/9094/files/dukutunafusagebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4211/9073/files/filmfare_awards_2019_watch_online_youtube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/water_heater_enclosure_amazon.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_off00005599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5599 5576 bytes
SHA-256: d9afbb0961be7b45b594c81175c7e7b2157b64938d5d5a8873badee973dd079b
font_01_sfnt_off00006869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6869 9860 bytes
SHA-256: 45fe3ba484e74cd3a836cbd0835277309ef58e50b25d362cde94f32b76d07a72

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