Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24ddb376d8b6f46…

MALICIOUS

PDF

82.2 KB Created: 2021-02-01 16:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b8c6f516183c4656f8d552f0f3882ce9 SHA-1: 4ec3a5aca53a071adaa16509eb720cb18e876615 SHA-256: a24ddb376d8b6f46863d4a905abcd7b6c624ebd4556a158d31d9eeafc8e8802e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of embedded URLs, flagged as a link farm, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://yafferge.ru/123?utm_term=monat+oil+uses In PDF document text
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/7e67abf6c516d55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_600f8fbdb124d.pdfIn PDF document text
    • http://baltika-trans.ru/when_will_princess_cruise_lines_reopenxvo6r.pdfIn PDF document text
    • http://juzajikadig.22web.org/maksud_pluralisme.pdfIn PDF document text
    • https://bakasilamor.weebly.com/uploads/1/3/1/4/131407315/mopitejalule.pdfIn PDF document text
    • http://susurrus.space/sebetaburabuvagsp046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387807/normal_60009464e3e79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_5fd09d9ad82d4.pdfIn PDF document text
    • http://abanca-electronica.com/pukikamajote442ex.pdfIn PDF document text
    • http://mikrotikwizard.com/gusibekonediwetovezigopus9f094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425917/normal_5fe0f265cd754.pdfIn PDF document text
    • https://dovinaturaxamij.weebly.com/uploads/1/3/5/3/135349119/genuxanane_zawol_salitixego_wakum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/norozovijalu/31925113804.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/womavenopewulubikiwiju.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/nejunenilawiraxupugarani.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/51286321582.pdfIn PDF document text
    • http://mosupixozijet.epizy.com/burnout_paradise_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/lamomodidunijopabakoda.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/62859868269.pdfIn PDF document text
    • http://matixonapoler.epizy.com/block_site_extension_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/fimiteb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCE 4472 bytes
SHA-256: 8706a5ce34a791941f3361fb9300870dd967dd78ba723e735b4454b196704fc0
font_01_sfnt_off00010b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0C 10044 bytes
SHA-256: 6699c348be17232eef050d6a54ce76589a30a834db7f1702c1200b040b7a6175
font_02_sfnt_off00012d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D60 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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