Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc3b48228ce9629…

MALICIOUS

PDF

80.4 KB Created: 2021-03-01 09:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9ac17782c3116dd44c866a2ce684718 SHA-1: 33b3f5542476d20c36a429b2183ae6aee5d1e8fb SHA-256: 8dc3b48228ce9629ec2fe04a03722ce26419c760e8d5ccd0e644082e308531c4
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, and contains a large number of external links. The primary heuristic indicates a 'PDF_SEO_LINK_FARM' with 30 external links, suggesting a redirection or phishing scheme. One of the embedded URLs, 'https://resalured.ru/aws?utm_term=minn+kota+powerdrive+55+lb+i-pilot', is likely part of this scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/aws?utm_term=minn+kota+powerdrive+55+lb+i-pilot
    • http://spindlndou.space/61529812823arcvc.pdf
    • http://ginajazadunoxix.22web.org/49303408045.pdf
    • https://varepanuror.weebly.com/uploads/1/3/5/3/135394497/fagada_vadazidavetozi.pdf
    • http://naturalgood.space/how_many_days_for_paternity_leave_in_south_africawpy5s.pdf
    • http://lianhua.life/xalalikz70q3.pdf
    • https://vilinumatilaji.weebly.com/uploads/1/3/2/7/132740241/garefaw.pdf
    • https://bufigolumixi.weebly.com/uploads/1/3/4/2/134234787/zodelotegaturuv-bezurodewa-vezefulorejaso.pdf
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/5054131.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kukadafimi.rf.gd/23292856545.pdf
    • https://s3.amazonaws.com/gogonof/oak_leaf_coloring_sheet.pdf
    • https://s3.amazonaws.com/bupesejirijejus/94605464279.pdf
    • http://lutolajawaw.rf.gd/26321544131.pdf
    • https://s3.amazonaws.com/zurovajij/who_makes_magic_chef_freezers.pdf
    • https://s3.amazonaws.com/wupixufekijax/arcsoft_showbiz_problems.pdf
    • https://s3.amazonaws.com/juwofuxufijup/90976307092.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e934.bin
b0e7280ab5b09cba14eda7593ad21e2b866b1a5656a388b3d14d7b28fb4ec69b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 5080 bytes
font_01_sfnt_off0000faa6.bin
2ea1c572d16719ba2efe49256f537286f62ee2ed0ec6a40f731741e26d8a8d31
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 13748 bytes
font_02_sfnt_off00012611.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12611 4324 bytes