Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00f1b1b93ef0b40…

MALICIOUS

PDF

76.4 KB Created: 2020-12-24 15:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8a0e6dceca805f1e0dbfefd808dc5f40 SHA-1: 9d38d12f70a47fa48600f7249264a00b32464187 SHA-256: d00f1b1b93ef0b4027574dfdc5022ccff8416a03e1bb723bb0c7ed15b5049d0d
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/strik?utm_term=tamworth+country+music+awards+2020+winners PDF link annotation
    • https://pasifoberili.weebly.com/uploads/1/3/4/8/134881239/7141fe657491f41.pdfIn PDF document text
    • https://mowavowami.weebly.com/uploads/1/3/4/5/134591552/5fb2d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422145/normal_5fa9e3fb74269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_5fbc384114e43.pdfIn PDF document text
    • https://newogofifexepe.weebly.com/uploads/1/3/4/8/134884114/bca9cbdf1266ccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5fc250a2dbeaf.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/doxifuba/nanostation_m5_configuration_access_point.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/falke_socks_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/70393592008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d27c37-8630-4bf3-8981-0decb910e416/symantec_endpoint_protection_manager_unexpected_server_error.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/ed_sheeran_galway_girl_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/real_time_applications_of_cloud_computing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c11d97-d2cf-4f34-9b13-30be0d347cb6/jogos_online_no_click_jogos_papas.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_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 5564 bytes
SHA-256: 4aa1d4ab23a0192c3d1bf51304aa8c1f34debb0d25befd1572e99019e0ce6d73
font_01_sfnt_off0001013e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 10240 bytes
SHA-256: 967570608a9dcc4b3e88e943df54e5b4b40af92cf71aa074b2c1da38c0d4ebc2

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