Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e86c43493cbdf79…

MALICIOUS

PDF

68.3 KB Created: 2021-01-31 17:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 32a2e27fc60267c465e1557a1f545021 SHA-1: 3b8ed54b927ac64db28886f82c631670048398bf SHA-256: 1e86c43493cbdf7954994117a533918ec69538641d817e284b2dac4b3d553894
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://yafferge.ru/shook?utm_term=download+shareit+apk+terbaru+2020 In PDF document text
    • https://wilulesutazi.weebly.com/uploads/1/3/3/9/133997377/3663894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fdc49ddb216c.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/3GNhiha/business_management_quizlet_chapter_6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5fd096c731ac3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413227/normal_5fe4fc949c904.pdfIn PDF document text
    • https://jekosupoma.weebly.com/uploads/1/3/1/6/131637113/ca840899ec84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460255/normal_5fc592ef12509.pdfIn PDF document text
    • http://immorta-cross1.club/balinivoanu3v.pdfIn PDF document text
    • https://xadupokunarufi.weebly.com/uploads/1/3/2/7/132710624/6949907.pdfIn PDF document text
    • http://foyou.store/515387540477x3xi.pdfIn PDF document text
    • https://wopadutizibum.weebly.com/uploads/1/3/4/3/134306931/5028234.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekowezitodog.rf.gd/uday_kotak_committee_report.pdfIn PDF document text
    • http://sotilikesad.epizy.com/cathryn_fox_libros.pdfIn PDF document text
    • http://disupenepoka.epizy.com/mitsubishi_air_conditioner_manual_sg12d.pdfIn PDF document text
    • http://wesonujojamoga.epizy.com/vibatadotasi.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_off0000cad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD0 5616 bytes
SHA-256: 61ffd871d70fc8a2dd3e52ba8813cab53afc5cbfe3277da73088031a3c5d7100
font_01_sfnt_off0000ddf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 11272 bytes
SHA-256: 0e9472a1f90fcc84a023569500e1e923a473d8dcfec0ec3d9b4c74697f8455d3