Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f0f280da21b7f0…

MALICIOUS

PDF

40.6 KB Created: 2020-10-16 06:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 39b13155a5f00a88f9e8d24d4323d3f9 SHA-1: 52e6e7f787d4db75bec9694300d7667495eb30ae SHA-256: b0f0f280da21b7f0720f0d2a106891644371e6354ec9d854e43aa22cfa6d33f2
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://cctraff.ru/strik?keyword=corporations+examples+and+explanations+pdf In PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/af6b87f725dd.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/garanimeretixe-berap-rivepimomiji-diboduburez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f8903d89a5f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f88415eb445f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f890808f3a7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f88d1dd8cfba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f88068bcdab4.pdfIn PDF document text
    • https://site-1043696.mozfiles.com/files/1043696/rokeserutogepubomi.pdfIn PDF document text
    • https://site-1039965.mozfiles.com/files/1039965/videoder_14_4_2_premium_mod_apk.pdfIn PDF document text
    • https://site-1038520.mozfiles.com/files/1038520/21183132667.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/1/0431/3071/6322/files/bilobaliba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6211/1637/files/70115792041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5047/5413/files/frase_del_dia_de_hoy_positiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7646/1759/files/ash_like_snow_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6378/5112/files/istation_new_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5578/2309/files/rcbs_rock_chucker_supreme_press_auto_priming_unit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1c68b5-bc9d-48d1-acd9-19ce0ec6c7ca/nararimubur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dcc3c29-3881-4e15-87bc-70a6949090da/mazafivikuzavipirudop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26217c4a-2361-4ca8-a95f-610c6ae72d13/fumimeziselurog.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_off000061c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C4 5160 bytes
SHA-256: 95e13c3b6d7c4f7a2c2fc5b00d02bca1f4f9bde931ca68babe8ffcafa3e47d90
font_01_sfnt_off0000732e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x732E 9976 bytes
SHA-256: 6417d21f9f35ca7c82d336ba1e0466e644ee9803c0189c44c40fe2d217e89645