Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e95bb4d120cfe44…

MALICIOUS

PDF

76.5 KB Created: 2021-03-29 07:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 791bd93ff8e4e4d8ea774cd978100739 SHA-1: ee3a83588b5562b2bbaaf91e72349df7462b5d11 SHA-256: 4e95bb4d120cfe445bf7c08964989cd9cdf3182ca7a650407f96a82a2d64f196
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to 'The Giver' vocabulary. The presence of numerous external URLs suggests an attempt to redirect the user to malicious sites, likely for phishing or malware distribution.

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
  • 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/strik?utm_term=the+giver+chapter+7-8+vocabulary PDF link annotation
    • https://cdn.sqhk.co/mofijovelu/dZh7BL9/dragon_rpg_dragon_village_m_mod_apk.pdfIn PDF document text
    • https://jaluburevajag.weebly.com/uploads/1/3/0/8/130874017/xetojizugopokopuba.pdfIn PDF document text
    • https://cdn.sqhk.co/todiwapubu/cNxghbU/59029349700.pdfIn PDF document text
    • http://bupatinewesep.66ghz.com/t_shirt_design_template.pdfIn PDF document text
    • https://bipokedofep.weebly.com/uploads/1/3/5/3/135322207/dadefufav.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/mexuvosikopimojok.pdfIn PDF document text
    • https://jalaxogazumin.weebly.com/uploads/1/3/4/3/134373329/3094094.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugejojejaf.epizy.com/79468530920.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/omega_juicer_warranty_phone_number.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_a84e3e110db142c4a7c629bb1bc95d96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/wuparavemil.pdfIn PDF document text
    • http://xakixezusasop.epizy.com/rakipivot.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/4233240034.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/1461373514.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/average_salary_of_cloud_architect_in_india.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_17ac439961fa4258976dba5e36d600b5.pdf?index=trueIn PDF document text
    • http://navibizo.rf.gd/fdic_call_report_information.pdfIn PDF document text
    • http://muxovunibo.epizy.com/88806764726.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/kivipok.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/judgement_paladin_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/99_yamaha_timberwolf_250_for_sale.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_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 5572 bytes
SHA-256: eb860e7c597d48e9f4e3321b2b033b1ea76e6345696045681adfb214dade491b
font_01_sfnt_off00010243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10243 10148 bytes
SHA-256: 51c521a7729eed3145ce42f6c46ea8eadb0e13b5cb183aefae891d4d2a189436

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