Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ba8ca04622bde4…

MALICIOUS

PDF

53.7 KB Created: 2020-10-07 13:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e7496db4f81f317903d662a76e9469ae SHA-1: e3bebfdc499ea91c9024e14570a8dcd032e9e3eb SHA-256: 55ba8ca04622bde4e95aff108a9c6ca4b432b74864eece3d936b2babbbc80f05
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=programa+para+boda In PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/jezodanozap.pdfIn PDF document text
    • https://site-1040512.mozfiles.com/files/1040512/lemofizatixebi.pdfIn PDF document text
    • https://site-1039356.mozfiles.com/files/1039356/gewudejifasuzijur.pdfIn PDF document text
    • https://site-1040325.mozfiles.com/files/1040325/92556299648.pdfIn PDF document text
    • http://sefola.valuefund.ca/uploads/1/3/0/8/130814328/mezetugir-dejoluluxo-tujitumutum.pdfIn PDF document text
    • http://jemufusus.wazany.com/uploads/1/3/1/4/131453133/zakomod.pdfIn PDF document text
    • http://files.valmalencoalpina.com/uploads/1/3/2/6/132682646/ba65a.pdfIn PDF document text
    • http://files.electronictaxcenter.com/uploads/1/3/1/4/131406999/a1d592872edfc2.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/60836b69-2b19-45fe-b1dc-fa0c660a3889/43673665030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c68cc63-6daf-462c-9e1a-d1737ea79537/safuzek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83138bc7-7195-4a6a-bf06-3393b90dcd7d/jadifixarujagaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc59f0f-821b-40cf-b6c6-59470f9f0d9c/pawobibusewuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e4ce90-37af-41bd-b71f-c2854902a96d/kilafotasenujinosemiwez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d9e114-8904-40a7-804e-ed06c5167cdb/jaxexivutipivokeburuburil.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F48 5208 bytes
SHA-256: 206e92aeb61fe2ee7bbac06b438fe3360869292d642a4b1727469ccc65fcc1ff
font_01_sfnt_off000080d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D6 2612 bytes
SHA-256: d2b2fd23c32b7fde022f380f7e36ebd5fbbef585a16e6441456549988bc60b62
font_02_sfnt_off00008c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C06 11288 bytes
SHA-256: 016d307637cb570c223b7795f3ca8af96507f45a0962269ca9e82a6acf975e84
font_03_sfnt_off0000b0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E4 16724 bytes
SHA-256: 7f2e9f20d3c120ac918236b1046eeb5774036ab4eaf5814c5ef48c74c1b32750

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