Malicious PDF — malware analysis report

Static analysis result for SHA-256 378d294d36fd1d0b…

MALICIOUS

PDF

54.8 KB Created: 2020-10-05 15:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fc99f8848e87c7d21b50e3f74a8ea6eb SHA-1: 245571dfbb05bfd8f10a74ff967b625f0cda9f91 SHA-256: 378d294d36fd1d0bfb92d606ae5ca33d231dd8192cc4a763250397ed287d1f30
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://ggtraff.ru/strik?keyword=factorizacion+trinomio+cuadrado+perfecto+ejercicios+resueltos+pdf In PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/87347619895.pdfIn PDF document text
    • https://site-1038749.mozfiles.com/files/1038749/bamag.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/49014271070.pdfIn PDF document text
    • https://site-1038808.mozfiles.com/files/1038808/jabosidosixulus.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/66280599209.pdfIn PDF document text
    • https://site-1039517.mozfiles.com/files/1039517/31149382909.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/10113552671.pdfIn PDF document text
    • https://site-1037893.mozfiles.com/files/1037893/27033072897.pdfIn PDF document text
    • http://files.airplanemusicgroup.com/uploads/1/3/1/8/131857270/disapivaletum.pdfIn PDF document text
    • http://files.thegratitudeadventure.com/uploads/1/3/1/4/131453698/385476af7.pdfIn PDF document text
    • http://files.guillome.nl/uploads/1/3/0/7/130775760/af87681c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/41642475-4af2-4754-9ad8-05a39f7a89fe/63299182299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a07733b-1eda-4035-90e5-d6efc636fc90/jaruwituba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e29648f-f101-4d9e-a075-30510555f409/76094664778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17fed8f5-08f2-471d-8287-a60b718d5e83/xemutibu.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000635c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00007351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7351 5264 bytes
SHA-256: 5a49767f54710e3393d4d36a1f7b23ea2069770359348f8dead25c5ccf58f1f5
font_02_sfnt_off00008522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8522 10672 bytes
SHA-256: 3703561b4881ffb2412c78a2cd38ed2346a62dd75154e5bd0de15b93a801fa92
font_03_sfnt_off0000a837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA837 16088 bytes
SHA-256: ccf42771811f3bfcfc4881e0ea26c61020463520b77f542a172ed5d532e4d210
font_04_sfnt_off0000bcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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