Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fee6605e6c4f5dc…

MALICIOUS

PDF

44.9 KB Created: 2020-10-11 19:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 524e56a0aade90fa4e992ce8eba494f8 SHA-1: 9d32533f9715e736549e6b4fcd079630b31ee1e2 SHA-256: 7fee6605e6c4f5dc8662edfaf9b1c282f8f86d75aad75e1afdee215bef57a977
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://cctraff.ru/strik?keyword=os+61+sf+anillo+de+pist%25C3%25B3n+expander In PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/fedipejekomepefu.pdfIn PDF document text
    • https://site-1042199.mozfiles.com/files/1042199/nujigisomemazo.pdfIn PDF document text
    • https://site-1042591.mozfiles.com/files/1042591/46013491133.pdfIn PDF document text
    • https://site-1041608.mozfiles.com/files/1041608/64283663069.pdfIn PDF document text
    • http://nanob.melissaannecarlson.com/uploads/1/3/1/8/131856698/7340378.pdfIn PDF document text
    • http://lonupaji.jessiebrownphotography.com/uploads/1/3/0/7/130739860/zilawu-mewubozuxuvet.pdfIn PDF document text
    • http://wijupota.parkjourney.com/uploads/1/3/0/7/130776356/rurogifi_kuvixowa_wejesi.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/5fe88fc7-3bae-4d7d-80d6-1aed0c3fa7fb/73588855581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4be103d-e126-4136-a66c-c656e3b8d42d/selexuboraluxawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5e9dd0-19f4-435c-9cb8-d8b51dcf9987/98247123137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0e550b-fd60-42fa-ae1b-44999e9a1660/riwofilipowutalawipol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c09fd2-bf4a-40d3-b01d-dba36e8c9dcb/guzarodawepasunotokadaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e94c090-3f58-48d8-a167-d0540b6ef574/zadapitemepoxasadipiboji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbe0ec4-48e0-406f-b757-f97e695a4a39/1507242238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d092db8-891e-40d8-ab59-ff1ca7fa11b0/losikokujuvogikexiz.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_off0000650d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650D 5472 bytes
SHA-256: 95601fb0f494ad6c42d2c7407292ffee381d72c855e18e14923d99c75b3eb7b3
font_01_sfnt_off00007777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 14836 bytes
SHA-256: 0b2ae08f9fd340d47b3046832bb0cda42e0440d9a190e74244409c6f785e9829

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