Malicious PDF — malware analysis report

Static analysis result for SHA-256 4024a984d62da065…

MALICIOUS

PDF

58.4 KB Created: 2020-12-18 11:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af1283fe391883f301972afced090290 SHA-1: e683fc29fc647bd2711c90ae408120108639ed79 SHA-256: 4024a984d62da065688b0a9550566750cbe86cc548ad44798619d807931145e9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, many of which point to disposable hosting services and are designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, and the presence of 'utm_term' parameters suggests a phishing or scam attempt. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8225

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=adobe+flash+player+android+9+apk
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/zimodabeniki.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdf
    • https://vosomomoratefuf.weebly.com/uploads/1/3/4/6/134614816/bd98f7029.pdf
    • https://dugeditukuvil.weebly.com/uploads/1/3/4/7/134723955/rexisozux.pdf
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/ab6418e8a07d516.pdf
    • https://noperutepa.weebly.com/uploads/1/3/4/7/134721309/d75261806.pdf
    • https://sadodirovi.weebly.com/uploads/1/3/4/8/134888529/5322413.pdf
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/fuzujobuxosuvajuje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fce13cb3775b77c105e55f3/t/5fd1c4c923f2866aa389200e/1607582924587/56873162367.pdf
    • https://static1.squarespace.com/static/5fc5b2f2c6229360eccdb2d4/t/5fd63fc513a48350e80d6786/1607876550544/tudofemuvapelabemokinuk.pdf
    • https://static1.squarespace.com/static/5fc4cd50be9b69395123d147/t/5fd665390f11661d4c2c1f87/1607886138218/baidu_spark_browser_for_mac_free.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcef28b474932ca266418f/1606217516974/alameda_county_superior_court_domain_web.pdf
    • https://static1.squarespace.com/static/5fc15a3c60f2895dc1eafeb7/t/5fcead7cc2632f090ac21f0a/1607380348812/free_antivirus_malware_download.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7bd.bin
c5ac2beada1c21effe4c90b2f990379bfffc1cfaff8a18800594f34e94734f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BD 5580 bytes

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