Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c8871c32510abc…

MALICIOUS

PDF

53.8 KB Created: 2020-10-03 14:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2a4305512d98693f08d57a7f4e17b83a SHA-1: 057e7b8314014c46d194235de0698872e2d1b8a3 SHA-256: 97c8871c32510abcaac317aae7d0e9e5d37f330c7de343d50174abf809c7a1f8
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=recette+mystique+pour+attirer+l+argent+pdf In PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/65153833843.pdfIn PDF document text
    • https://site-1040164.mozfiles.com/files/1040164/69257315641.pdfIn PDF document text
    • https://site-1036684.mozfiles.com/files/1036684/97552880280.pdfIn PDF document text
    • https://site-1038790.mozfiles.com/files/1038790/9560813313.pdfIn PDF document text
    • http://mifozisuf.turkeytimesports.com/uploads/1/3/2/8/132814930/xemuzovepe-gujugoxizoxakug.pdfIn PDF document text
    • http://vifiru.sjcoescience.org/uploads/1/3/0/9/130970023/9359607.pdfIn PDF document text
    • http://noden.expressionsofinspiration.com/uploads/1/3/2/6/132680949/fitusaleferewiv_newemitovukaxi_vogera_loserojeko.pdfIn PDF document text
    • http://lukosogi.votsqf.com/uploads/1/3/1/6/131637030/4486763.pdfIn PDF document text
    • http://xidefev.lisarowlandsconsulting.com/uploads/1/3/0/9/130969632/eecf46071.pdfIn PDF document text
    • http://files.thepeoplejourney.com/uploads/1/3/1/4/131437669/065a3e96d5.pdfIn PDF document text
    • http://jubukexu.gracebecker.org/uploads/1/3/2/6/132683138/3248077.pdfIn PDF document text
    • http://files.auroraarearetiredteachersassociation.org/uploads/1/3/1/0/131070151/4b0dc16e10.pdfIn PDF document text
    • http://files.brittanyhelvyfitness.com/uploads/1/3/1/4/131454024/dipurudowunimim-jorobe.pdfIn PDF document text
    • http://files.casskdesigns.com/uploads/1/3/1/3/131383380/228f50525a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 5712 bytes
SHA-256: c7f19409f0111ad2f659d87e8c16d9aa13d9663c0b696bff8b83d2c7505e278c
font_01_sfnt_off00007964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7964 3824 bytes
SHA-256: 337e2322a7033b7521f77000353536c91a03a09b827ee9c21a9198444cc4c693
font_02_sfnt_off00008489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8489 12536 bytes
SHA-256: 3bd8520b1e161a6e2c0451972cfe20752724c42c31b260b70cf0e318ecb2c1c3
font_03_sfnt_off0000ac10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC10 18092 bytes
SHA-256: 0a21142105c5958adc88c098f01789d4dfe01a1b2cb74557075f6300fecceef9