Malicious PDF — malware analysis report

Static analysis result for SHA-256 702cc6e43e565a74…

MALICIOUS

PDF

86.1 KB Created: 2021-03-22 08:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 881925e1cad9eda8200460fb5f91a3a9 SHA-1: 1e6926acab88959446e08adb3e94adddfd8dd8dd SHA-256: 702cc6e43e565a74b1e79b3c2a3c4e6d21b26a388791a8063bbcf78e2aeb7774
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, forming a link farm, and one of the primary links directs to a URL associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be related to search engine optimization and product pricing, suggesting a lure to a malicious site.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=infinix+note+7+price+in+india+flipkart+today
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/lakiwobir-vaxaloginokosu-jakasijexapo.pdf
    • https://cdn-cms.f-static.net/uploads/4464871/normal_6055ee7aad46a.pdf
    • https://geworusidexaj.weebly.com/uploads/1/3/5/3/135306562/pakazigajosot.pdf
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/6556232.pdf
    • http://tuzupibu.scienceontheweb.net/fubufazojiv.pdf
    • https://berijuwijupev.weebly.com/uploads/1/3/1/6/131637896/levoven_zozarorogunum_bokagawiwu.pdf
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/linokan.pdf
    • https://static.s123-cdn-static.com/uploads/4482399/normal_5ffff2c752faf.pdf
    • https://cdn-cms.f-static.net/uploads/4371543/normal_601e408ac1874.pdf
    • http://xifasiv.getenjoyment.net/rearrange_page_order.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sepovutapakogaf/how_to_do_coding_in_grounded_theory.pdf
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_19c5bb6ced2a444b8f59bb08e12f2e0d.pdf?index=true
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_31f1ff683b274bb98282e6101dda1417.pdf?index=true
    • https://s3.amazonaws.com/wuvepilamamuse/why_is_my_samsung_smart_remote_blinking_red.pdf
    • http://jifisuxevizek.myartsonline.com/43335410926.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/bootstrap_template_creator.pdf
    • https://s3.amazonaws.com/bupesejirijejus/22552986800.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113bc.bin
b90324a01165980befa3bdf5de23fc0ad5fef411eac2d43ac7bf1e3e95872d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113BC 5220 bytes
font_01_sfnt_off000125a5.bin
bec7cd752040ce55762fac1df7f745fc6d0288d02862a28556d6a9903be0c61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125A5 11192 bytes

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