Malicious PDF — malware analysis report

Static analysis result for SHA-256 9213f4e55cb08812…

MALICIOUS

PDF

64.9 KB Created: 2021-01-18 01:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 093826d110adb7876f4d67dce6a0924b SHA-1: c1bf05849074469b74e6b63f9ef8a1c7a0032b25 SHA-256: 9213f4e55cb08812612bc88e21b60fdfc56c2cb3fe9a25b7b2e0c0359458fb08
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 large number of embedded links, many of which point to external resources, indicating a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting the document is designed to lead users to harmful sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://ggtraff.ru/123?utm_term=predicting+products+of+chemical+reactions+worksheet+pdf+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5f9cca620dfc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422392/normal_5fe074fdedc65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5f9d755ab70a8.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/TciiicI/wyze_app_not_downloading.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/Hiisfja/nagidisafo.pdfIn PDF document text
    • https://cdn.sqhk.co/nijalemivowo/hhAPhaH/pubivuxufefirifefofojip.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/e3d132a1eec06.pdfIn PDF document text
    • https://bofufawikifof.weebly.com/uploads/1/3/4/2/134235483/5f6af82.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/8180748.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/hbjayha/xoramoguk.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/ribowexulo/zuzetirefidizurebef.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/menutuzumaxuwikojofiwub.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/spotify_ad_free_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/3664335773.pdfIn PDF document text
    • http://betewegomoge.epizy.com/ardisia_compressa.pdfIn PDF document text
    • http://malinaliwul.epizy.com/basic_algebra_equations_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/88817771487.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/62092651784.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_off0000c110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC110 5724 bytes
SHA-256: 6fb8f5f4438449c593ecbcccef3b7ff71af7add741c5a2b5628dc261393641f7
font_01_sfnt_off0000d474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD474 9820 bytes
SHA-256: 005123efd6683f44ebc34449dcc00855396bc3b6570eda7ca03354c3de9114dd

Open this report in the interactive analyzer, or submit your own file for analysis.