Malicious PDF — malware analysis report

Static analysis result for SHA-256 c198840007c08090…

MALICIOUS

PDF

46.5 KB Created: 2020-10-05 13:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: dd5dc99dbf2103d421374bce2fa870cf SHA-1: e519d07bb7d56df7f946886d4649d25597df362b SHA-256: c198840007c080902384f24b4f366cdbb08844b81b0a0650b8eb0397da8e7fb3
164 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.
  • 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://cctraff.ru/strik?keyword=family+disease+model+of+addiction In PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/tabuvokewefudewokatep.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/5926282279.pdfIn PDF document text
    • https://site-1041084.mozfiles.com/files/1041084/fowupojotazenabosebagov.pdfIn PDF document text
    • https://site-1038407.mozfiles.com/files/1038407/sesoxur.pdfIn PDF document text
    • https://site-1040203.mozfiles.com/files/1040203/wikiwabikutinaxudo.pdfIn PDF document text
    • https://site-1043880.mozfiles.com/files/1043880/10547109659.pdfIn PDF document text
    • https://site-1043093.mozfiles.com/files/1043093/7469607264.pdfIn PDF document text
    • https://site-1038799.mozfiles.com/files/1038799/genanosejexunak.pdfIn PDF document text
    • http://bitagif.openmindimprov.com/uploads/1/3/1/1/131164239/nixetuxafojopumikeg.pdfIn PDF document text
    • http://badixube.scheffsound.com/uploads/1/3/1/3/131380284/dowafata.pdfIn PDF document text
    • http://disaruji.britishcolumbiaschoolactsection177.ca/uploads/1/3/0/7/130739101/xurab_xopojurifuju.pdfIn PDF document text
    • http://buboso.pragmaticinstructionaldesign.com/uploads/1/3/2/7/132741064/vetifob_vularom_wawadepizaj_bebizorosi.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/8701c8ae-f74b-42aa-ad74-461e6e76177b/34434424915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b290692-82df-4c33-9300-d5eb4199ae2d/9556271475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00dc89cd-ccd1-4528-8f70-2c0f2417b6a3/22431020281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fef8185-0d3e-4f77-979b-1f01e5d60a8a/wuledu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC9 4916 bytes
SHA-256: e6d5740614ae81a4207cd53b864104b7d640d0f5502394e495acfdfb61131b64
font_01_sfnt_off00007b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B78 10284 bytes
SHA-256: 68e8c55bd52a9595aa7e1e5f4b853963cb59f575d1103d732fadfa5c78ec7d23
font_02_sfnt_off00009e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E93 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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