Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a58fd18efa6185…

MALICIOUS

PDF

72.9 KB Created: 2021-02-26 10:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f9a113d2d924300b324a60e0d42896d1 SHA-1: bc7b9d0ddab2787af4a9a0bbeda633c6e01ace14 SHA-256: d8a58fd18efa6185316c6cf90df500dd4e6008f0b56140ae96cfdcea2232e63c
176 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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/award?keyword=hp+deskjet+1512+not+printing+correctly PDF link annotation
    • http://pasasem.iblogger.org/infinite_limits_worksheet_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_60055cc1966e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_602d525f42db7.pdfIn PDF document text
    • http://setifol.66ghz.com/which_companies_are_iso_27001_certified.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404740/normal_5ffcb95b49785.pdfIn PDF document text
    • http://rirenanevigi.22web.org/juribuwonilorudopinizixej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_60200008a549c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5fe0a4cb22f90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388279/normal_5fded86f2353b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ledolabufimo.epizy.com/cisco_sg350-_20_datasheet.pdfIn PDF document text
    • http://lejominikezig.rf.gd/mirigegofisol.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/biometric_fingerprint_attendance_system_free.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_off0000e0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F9 5540 bytes
SHA-256: 4c8ca3ed8e5a755d76445133dd075f95ecb8dc75880892a5d0186a527e9aa6f0
font_01_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 10240 bytes
SHA-256: 1ccd3438da9d08af96daae189c58b57348b6c2de08f2a60933e0817a1735e18a