Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6e893d30478257…

MALICIOUS

PDF

68.6 KB Created: 2021-02-28 15:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 077d20a32e21089515723dafdd3ad8d0 SHA-1: ceb73627836e8b547da9e9f35efe903c4130514a SHA-256: bd6e893d30478257829b9eeeca6d051640a5038c65a2a2dd89a480ac4bef73f5
126 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs pointing to disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not explicitly detailed, is a common method for exploiting PDF vulnerabilities or initiating redirects.

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 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://druttle.ru/wix?keyword=cello+bow+case
    • http://lorakuze.sportsontheweb.net/84636871368.pdf
    • http://aicberg.net/math_accelerated_a_pre-algebra_program_answer_keym8sls.pdf
    • http://armada.technology/hp_pavilion_dv6_notebook_ssd_upgrade0luk1.pdf
    • http://lumobumekola.getenjoyment.net/xiveda.pdf
    • http://euroshopme.site/fubavegiziju3dmcv.pdf
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/xigobobul.pdf
    • http://pinegobojefo.getenjoyment.net/gesufovaxibulixavunuvasi.pdf
    • http://getliterate.online/8k6dxy.pdf
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/jubule_safapaxoxoj_sinepoxawu_voxebogik.pdf
    • http://reduslimitalia-ufficiale.site/xaxakirumujomefiwafaki6t1wr.pdf
    • https://cdn-cms.f-static.net/uploads/4379856/normal_6036c52bcf01f.pdf
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5fd9d733386e7.pdf
    • http://mizebojusur.mypressonline.com/how_to_write_measurable_goals.pdf
    • http://gprofights.ru/7_days_to_die_map_generator0b9dl.pdf
    • http://trycabinets.xyz/xomopa2l94f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kakasis.onlinewebshop.net/zefakoligaretagovamamaxe.pdf
    • http://gafodix.myartsonline.com/lidatipuvobeboj.pdf
    • http://girofili.myartsonline.com/new_york_city_map_sightseeing.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_off0000d16f.bin
0f9586265bfbfd4095ed52ab397449b5b76a0263a910b186cf5c63cf5460cd3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD16F 4832 bytes
font_01_sfnt_off0000e1ff.bin
901e37769bfa30c370e5103e5cba471ead1557fc0d4fc6d50b26278d67a94d4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FF 10024 bytes

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