Malicious PDF — malware analysis report

Static analysis result for SHA-256 f930964b38b1c01a…

MALICIOUS

PDF

79.8 KB Created: 2021-03-18 15:12:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2ed0495f0ac74f7eb17f12f57ca9b19e SHA-1: 54508a2a9d69e9861ea73d1930d9f9e71c513ca1 SHA-256: f930964b38b1c01a5a55bf7a23755b3cff337c29784d5d8f95b8efb8eff4bec5
156 Risk Score

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dafemum.ru/wix?keyword=nursing+images+cartoon PDF link annotation
    • http://vofuvomo.iblogger.org/94990477757.pdfIn PDF document text
    • http://vojakebuniseti.22web.org/82885839877.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/dH6HGAQ/nitenavigoje.pdfIn PDF document text
    • http://lewodozena.22web.org/vce_on_labs.pdfIn PDF document text
    • https://bagawilikazukir.weebly.com/uploads/1/3/1/0/131070307/2371586.pdfIn PDF document text
    • https://cdn.sqhk.co/tovozovuzedu/czjihcr/chata_fatranka_sutovo.pdfIn PDF document text
    • http://fokitekobewamor.iblogger.org/bayeux_tapestry_worksheet_ks2.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/NJUggzS/free_ringtones_android_music_ringtones_downloads.pdfIn PDF document text
    • http://ledabojuvogo.22web.org/pdf_split_merge_mac_free.pdfIn PDF document text
    • https://giximelet.weebly.com/uploads/1/3/4/2/134234701/tawusuxalawi.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/mefovu/cake_mania_main_street_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/the_art_of_self_leadership.pdfIn PDF document text
    • http://didopip.epizy.com/16480023014.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/16006142739.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/99909345240.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/wimudiperad.pdfIn PDF document text
    • http://zemufobure.rf.gd/website_quotation_template_free.pdfIn PDF document text
    • http://sijedopebe.rf.gd/beauty_and_the_beast_piano_duet.pdfIn PDF document text
    • http://zazujipediwa.rf.gd/bloodstained_ritual_of_the_night_platinum_guide.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_off0000ff0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0C 5056 bytes
SHA-256: a15848ed2a607d67b5acc001446bb351b30f06d9b8f66a06d3a3b4b699ba87e5
font_01_sfnt_off00011028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11028 9972 bytes
SHA-256: 1b0233c93f7b2e121586f1105a3f18e0c2feb22ac86d4c8e8d8970d27f7c6bb1

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