Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0c96033fb1cd4f…

MALICIOUS

PDF

70.4 KB Created: 2020-12-30 17:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e10a222823c2fee3bf0684f5f1550ccd SHA-1: b88df24954193c3d73218943a5114aa1d003a91c SHA-256: 3d0c96033fb1cd4fde1d80aed382ac2995c7ba5b54014b8c133f5d1a2f899440
214 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://cctraff.ru/123?utm_term=friedman+fables+discussion+questions+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://s3.amazonaws.com/zuxadol/50967953892.pdf'. The ML classifier and ClamAV also flagged this file as malicious, indicating a high likelihood of malicious intent, likely related to phishing or malware delivery.

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://cctraff.ru/123?utm_term=friedman+fables+discussion+questions+pdf In PDF document text
    • https://cdn.sqhk.co/wuzirixowev/ir7MhdU/rarest_pokemon_card_charizard.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/56c4742ffb2635.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/xudoranogas_mosavakuka.pdfIn PDF document text
    • https://kafedujewerom.weebly.com/uploads/1/3/4/6/134622586/c7c83.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/edqhguf/sopateguguk.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/zuxadol/50967953892.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/comic_template_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/88460709149.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/guides_to_effective_instruction.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/wauconda_high_school_powerschool.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/lufitirojamuwabuzak.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/android_update_apps_not_installed_from_market.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_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 5520 bytes
SHA-256: b4378477ab0ea4ae74742ac8bcd4da37a360fccf1184c6136ead30ef11137810
font_01_sfnt_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 10188 bytes
SHA-256: 7995c2f45e8d58534893e5fe3db7a02a67dc9becbad609acb24e99c8a9964add

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