Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2793c948141b6f…

MALICIOUS

PDF

68.3 KB Created: 2020-12-29 12:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 14d1bf9b47c9c6e94f2069636f34bee2 SHA-1: d0df1e20c8a1a6c8e355fddf8adfbe6d4db131c6 SHA-256: 3f2793c948141b6f64b1120c3f3f1e1ea835a9a260b83e916227c46866eea6cb
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF link farm. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs suggest an attempt to redirect users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/123?utm_term=boot+scootin+boogie+dance+easy In PDF document text
    • https://rojanebe.weebly.com/uploads/1/3/1/6/131637229/fded6420a.pdfIn PDF document text
    • https://cdn.sqhk.co/sivunukiwe/jburue9/tuxelozufudodazoduzej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476135/normal_5fc91e3ae7482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450864/normal_5fa7aa1690898.pdfIn PDF document text
    • https://kufesolujuxubi.weebly.com/uploads/1/3/4/3/134373324/ladozinudaliwik.pdfIn PDF document text
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/ralijadujomodidi.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/sedimeraxufi/country_airport_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/zoxadus.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/kamico_reading_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/fifa_19_download_apk_without_a_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56ca635-9b43-4036-9d15-2978ce5de2e8/83322449083.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/39700816795.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_off0000d00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00C 5268 bytes
SHA-256: 067ae6ae2057290617f12a90b335d173d85f040edc788e2b6e06845819be84ce
font_01_sfnt_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 10076 bytes
SHA-256: d6428155511d70e675e2e4317dc9db9a130c575e3e0e73c24f4b6817bef3213b

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