Malicious PDF — malware analysis report

Static analysis result for SHA-256 022e4ee5f8632f65…

MALICIOUS

PDF

68.7 KB Created: 2020-11-23 04:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d0718d9866cb8d646decbb46c76198ae SHA-1: 9460c84a188ec268182536e581830a28eea1354c SHA-256: 022e4ee5f8632f6518834d079617220b098ceadee6fa2ffc12963d1571e35347
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=ikea+clothes+rack+with+cover PDF link annotation
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/noxid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464995/normal_5fb3c5400e1e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382782/normal_5f8be28c503e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f8cf65c25201.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/xenavuxa/anti_terrorism_commando_mission_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23149682-e31a-4468-9524-ee7e42fa70d6/sopa_de_letras_ciencias_naturales.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/oxford_bookworms_library_stage_1_love_or_money.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/command_prompt_hacks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9c4239-532b-475c-843f-b769b967c7de/28321410275.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/land_development_agreement_format_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/menibopewaguvunowute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8926b0aa-98e8-49dd-a988-0cc7c9833bef/21898237721.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_off0000cd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD50 5040 bytes
SHA-256: 698479b72dfc29243066070836cf296747ba8b48fedc14f57a9c344594407bbd
font_01_sfnt_off0000de87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE87 11288 bytes
SHA-256: f042f0f3f63bbf6d69aeb2a9a2fafa96a9045b149be2a7ed9ef235b34185a1fd

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