Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c6aa1fcbbe48ba…

MALICIOUS

PDF

71.5 KB Created: 2021-03-19 18:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e1e45988acd0f219254838259ca48571 SHA-1: 80910d62a885cd46427d27b6eeb576c5a521a2cd SHA-256: c4c6aa1fcbbe48baa6e796ecde40c0367654cfb11e690926242597f009673da7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/123?utm_term=bollywood+news+video PDF link annotation
    • https://bogiziva.weebly.com/uploads/1/3/4/3/134338427/4349945.pdfIn PDF document text
    • http://mini-cam2.club/spesifikasi_minimal_adobe_premiere_pro_cc_2018wg521.pdfIn PDF document text
    • https://lobixeximoruse.weebly.com/uploads/1/3/5/3/135319822/sasarumamafovudilam.pdfIn PDF document text
    • https://nipixejewawowe.weebly.com/uploads/1/3/0/8/130874539/zerixemokiditus-gezuxe-sobididexi.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/what_is_a_wake_for_a_dead_personzlyi3.pdfIn PDF document text
    • https://tozisodije.weebly.com/uploads/1/3/4/4/134486105/1611834.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/phone_says_line_in_use_centurylink.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_602aac6a90286.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456140/normal_5fcfa3d196531.pdfIn PDF document text
    • https://nenatuver.weebly.com/uploads/1/3/4/0/134017756/busewisokizapomefapa.pdfIn PDF document text
    • http://tendernes.ru/84446073445h711y.pdfIn PDF document text
    • http://opensalon.xyz/fodubatobumewimubazefawoeb6ib.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/67477660174.pdfIn PDF document text
    • https://pananufizusa.weebly.com/uploads/1/3/4/4/134445813/dubek_radosi.pdfIn PDF document text
    • https://faloxumotib.weebly.com/uploads/1/3/4/6/134646793/4792114.pdfIn PDF document text
    • http://connexion-amelii.xyz/cad_2010_keygen_freeoouq6.pdfIn PDF document text
    • http://naturagrush.space/32003769820ot5ih.pdfIn PDF document text
    • https://xidujodoj.weebly.com/uploads/1/3/1/0/131071067/5795835.pdfIn PDF document text
    • http://kafofal.mygamesonline.org/personal_swot_analysis_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445750/normal_602a1d088f960.pdfIn PDF document text
    • https://bulejoge.weebly.com/uploads/1/3/0/7/130775594/906f61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kesolimasakifi.myartsonline.com/when_did_the_dyson_dc35_come_out.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_off0000d91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91E 4816 bytes
SHA-256: d065927d0a7fa9d98ed84944463894b9bea53c8b83da738dee76f750cfa4db54
font_01_sfnt_off0000e9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B6 11492 bytes
SHA-256: 97962adaa810126462382f9e71ec751e41f61b9ef12a6ebc7a4937d69b0fb44e

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