Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e2ae5a6058944b…

MALICIOUS

PDF

103.0 KB Created: 2021-01-11 14:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7329984ee44435e83904708bdb8dfe25 SHA-1: 7ca1494c225e95c8a43374fd9d343264c283b65b SHA-256: 89e2ae5a6058944b8be3ece0c74ec904c7d8ad59564f07a8c2fee6cb09d6bb0f
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://gettraff.ru/123?utm_term=tradestation+easylanguage+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470980/normal_5faae58f58ea2.pdfIn PDF document text
    • https://site-1178138.mozfiles.com/files/1178138/xowefuroparigam.pdfIn PDF document text
    • https://site-1176655.mozfiles.com/files/1176655/say_hi_mom_in_french.pdfIn PDF document text
    • https://zawanudodulir.weebly.com/uploads/1/3/1/4/131452903/zigufos.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/6uTgckS/zombie_killer_2d_mod_apk_free_download.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/kalomip.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/fibesezati/wapking_movie_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/2546118079.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/adobe_reader_application_initialization_error.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/rivezezagevapopod.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/lifowiregeponux.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/20565493043.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/fillable_form_template_word.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_off00015679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15679 5196 bytes
SHA-256: f3624387799a2d60663f275eb43b6f5f6f719b20e1eb81546de8d2313aa36ba8
font_01_sfnt_off00016817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16817 11900 bytes
SHA-256: de799687da1277d9310e34a857905248454b0fbd134264b13a3f8e4d86d471ac

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