Malicious PDF — malware analysis report

Static analysis result for SHA-256 c009e5ca9d71ef70…

MALICIOUS

PDF

63.9 KB Created: 2020-11-17 09:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 067a7f260433cebea9b3670ce074d0bf SHA-1: b796c3d5fa8ead5c7022821645abf37d06259b8c SHA-256: c009e5ca9d71ef70165352d276ba19e8544fcf1b8d85b9794240090d73382e57
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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. The embedded URLs suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=kelebegin+r%25C3%25BCyasi+full+izle+tek+parca In PDF document text
    • https://tumekisegazuf.weebly.com/uploads/1/3/4/6/134611428/acaae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_5fa53adfc82db.pdfIn PDF document text
    • https://bagexefegaluja.weebly.com/uploads/1/3/4/3/134393574/9e17a10.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/8108899.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/kizugokofo/22935477590.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/extreme_car_driving_simulator_hacked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/nba_2k16_pc_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/video_burung_cendrawasih_menari.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/go_math_grade_8_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/vodarav.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/7883293769.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/cut_the_rope_pro_savage_unblocked_games.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/3642421350.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/metric_to_imperial_conversion_charts.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_off0000b8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E0 5628 bytes
SHA-256: 28490598514114f34a35963c303de8c72f0ed96d8de58a283e503dd359cfde88
font_01_sfnt_off0000cbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF4 11772 bytes
SHA-256: d0760b53b5a4c49eee2daec79a634de4d8636b2b084fdc1006771f6c173726a8

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