Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2817d8231be639…

MALICIOUS

PDF

72.5 KB Created: 2021-03-01 15:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: aa09e14c2fa016d808db5076c43e89d5 SHA-1: 0cb9e7d6f79c14c62b0fbfd14ea871b3ffe7e609 SHA-256: 9e2817d8231be639be2c555ba479f9bca60becbc67f77d9fcf5c3ef2c5953d5c
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/award?keyword=block+diagram+simplification In PDF document text
    • https://sudegefaxir.weebly.com/uploads/1/3/5/3/135323135/pipofidolupugim_rakeridevevewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410030/normal_60107b05b57b9.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/FiaZyhg/fruits_vegetables_high_in_antioxidants.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_60399b80dcd87.pdfIn PDF document text
    • https://mupexopuwes.weebly.com/uploads/1/3/4/7/134722910/7a6d3802704fcc7.pdfIn PDF document text
    • http://appless.space/78630245381u98bt.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/jgcahcZ/74263988193.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/f5o3m1g/pupotiluwosapapuxoxax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_600fc760660a0.pdfIn PDF document text
    • https://tomosuboma.weebly.com/uploads/1/3/5/3/135382902/lunex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474475/normal_60365ba42ad6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiduritunibo.epizy.com/gajisevomibudubivo.pdfIn PDF document text
    • http://jidafamibudajir.epizy.com/besevezaretuzezudi.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_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 5588 bytes
SHA-256: eaa9006ea36ae852e533880e49e33c3a802fdabe4d437b774c846d1226f2d2f3
font_01_sfnt_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 10160 bytes
SHA-256: 168a3c2fb43c970612b42488770cd592e605746e730f54f534c7bc8625cf4289