Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe2a7b24788269b…

MALICIOUS

PDF

71.1 KB Created: 2021-01-10 20:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fcf9d37d63b9b92647303381dbed0c45 SHA-1: 6dabba67a77acefa40c6006826afc26ef2affe3f SHA-256: bbe2a7b24788269b90ef78db39d5df4f516f8ac8cc972e8cd420ca3552fe885c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains numerous links to external websites, many of which are identified as malicious redirectors or part of a link farm. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature, suggesting it's designed to exploit users through deceptive links.

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://cctraff.ru/123?utm_term=lattice+privacy+screen+on+deck In PDF document text
    • https://site-1178351.mozfiles.com/files/1178351/joluvitunowunejezidufizub.pdfIn PDF document text
    • https://cdn.sqhk.co/xelibini/giiihjp/amiibo_navirou_monster_hunter_stories.pdfIn PDF document text
    • https://dunidapakepew.weebly.com/uploads/1/3/4/3/134319263/rakomazek_vogoso.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/zadoniko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450641/normal_5fd788573d99a.pdfIn PDF document text
    • https://cdn.sqhk.co/faruzikako/chejaDq/hocus_pocus_max_dennison_phone_number_blurred.pdfIn PDF document text
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/rabowalapi-wegita-fajojexa-witone.pdfIn PDF document text
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/tawipadame.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/goviwigax/dirt_bike_games_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/jumokema.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/84773554143.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/69528692718.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_off0000da23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA23 5200 bytes
SHA-256: 06cc9fbf34d70f7516ba9a3351f912b42e959bc6b96cea95f535ee4d49ce3607
font_01_sfnt_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 10348 bytes
SHA-256: 3f644eb520f025d93cf3ad8d4441cca99c9ddb414b919392d2a071b6b3b6b1ea

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