Malicious PDF — malware analysis report

Static analysis result for SHA-256 84599237cc1c4a01…

MALICIOUS

PDF

71.9 KB Created: 2021-01-04 12:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 55e748e3869047491d7c2aeb7521316a SHA-1: 906c497b488485e3c43d38eb518a907def095896 SHA-256: 84599237cc1c4a0126810e43a525fbb6db71f2d77f6394b5883b28fd6471c80e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=corona+beta+for+sketchup'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://gettraff.ru/aws?utm_term=corona+beta+for+sketchup In PDF document text
    • https://cdn.sqhk.co/lexewagoz/ZhcIVjb/68691671781.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxadol/hitachi_arietta_850.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/gulowikalazokudofoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/biography_information_blanks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b62f07-4ed3-4c7e-ac4a-0d99a6d55520/cuidados_de_enfermeria_durante_el_pa.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/4112661187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219f8334-fe1e-4e95-93df-cab7953dc829/tire_sales_florence_ky.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/sagixuraxodowudisuperola.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/simabezipapij.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/zadudorisujumavekulit.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/kizamumekalikogigejazo.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/datipulutugivezetewobikis.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_off0000dc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC78 5180 bytes
SHA-256: 78e1d09f3e538600d87fb2d4ee4e659f1d1df940415584a51fb4878f85fef72e
font_01_sfnt_off0000ee11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE11 10840 bytes
SHA-256: dacf4c438f9d00f3df99a0d5b593b05b29c38645656362dae5ba3b1b1b426a59

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