Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4f0595d0a80bc5…

MALICIOUS

PDF

80.7 KB Created: 2021-01-17 13:34:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 62d66d86f60aa11ceee29db572f5413a SHA-1: 2cda8c16d8c460c90ee93c9962a52d63efed5092 SHA-256: 1d4f0595d0a80bc537bd96a0832602307d3c994e5a6e41dfa72feff5fb3f434b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating redirection to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'android box ireland' and appears to be a lure for users, likely leading to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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=best+android+box+ireland In PDF document text
    • https://site-1176402.mozfiles.com/files/1176402/battery_charger_portable_ac.pdfIn PDF document text
    • https://site-1166084.mozfiles.com/files/1166084/9596988549.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/8933825.pdfIn PDF document text
    • https://gugajapu.weebly.com/uploads/1/3/5/3/135330564/8054480.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484997/normal_60012d110e5dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f886938014b9.pdfIn PDF document text
    • https://site-1176357.mozfiles.com/files/1176357/bovada_poker_rigged.pdfIn PDF document text
    • https://site-1166673.mozfiles.com/files/1166673/vejiradaworil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366354/normal_5fc6904439122.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/faduxodiwo/66185592581.pdfIn PDF document text
    • http://veguxakafopuvix.epizy.com/sitoliwebi.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/95213513570.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/google_assistant_apk_android_5._1._1.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_off0000fb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 5076 bytes
SHA-256: 5dedf179af7c33401ee36dfa5b05d5a49696ab7609404765947dc2a00fcc43fd
font_01_sfnt_off00010cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD9 11628 bytes
SHA-256: 09487408e13d77a94651d23ac4a71df43156d2edb77097fd0172fc77fd22d7a2

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