Malicious PDF — malware analysis report

Static analysis result for SHA-256 5450d1d1df3ac781…

MALICIOUS

PDF

79.3 KB Created: 2021-03-21 06:02:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: beeeb86347eea7834a4afb5f5d8f814f SHA-1: b9e5aed5735e62d4d0d76c736c8c28e9dcd8ee02 SHA-256: 5450d1d1df3ac781986f54f3bb9d3c26934d9f23dee94054053f56bdf3978691
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript to facilitate redirection.

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://dugedepap.ru/123?utm_term=naming+branched+chain+hydrocarbons+worksheet PDF link annotation
    • http://gatorama.fun/148900096363jtl7.pdfIn PDF document text
    • http://mmamba.ru/tl-wr841n_login_adminytu38.pdfIn PDF document text
    • https://xexofukirusolim.weebly.com/uploads/1/3/4/8/134871283/kaxomesefate_julijojomopal_bokatesawi_lanodut.pdfIn PDF document text
    • http://frankiearvelo.com/4970833929880cwz.pdfIn PDF document text
    • https://jabukilitidaz.weebly.com/uploads/1/3/2/7/132740438/dajonafovivagedajapa.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/718bde2bd.pdfIn PDF document text
    • https://menufaron.weebly.com/uploads/1/3/0/7/130775522/zezev-razaloxi.pdfIn PDF document text
    • https://xewidepomizexas.weebly.com/uploads/1/3/0/7/130775014/7438338.pdfIn PDF document text
    • https://vitasexabu.weebly.com/uploads/1/3/0/8/130813400/b8fdad7d0be3d9.pdfIn PDF document text
    • https://bolamowoxuwev.weebly.com/uploads/1/3/3/9/133997192/zukogexuwerupid-punujuxizebubin.pdfIn PDF document text
    • https://ziregorex.weebly.com/uploads/1/3/5/3/135351653/kelexovijenir_zewatubowirin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimobepetokonud.myartsonline.com/comptia_server_training.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/letter_heading_template.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/jasper_report_text_field_new_line.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/68562456396.pdfIn PDF document text
    • http://molujafit.atwebpages.com/agendas_2020_en_para_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/51168350952.pdfIn PDF document text
    • http://kebenubes.onlinewebshop.net/fixed_asset_management.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/74844916773.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/gevubugetutokujujifatew.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_off0000f7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B3 5688 bytes
SHA-256: b9b3e3c0e321f26f7372eef3a244f73320a0d770a83f16e9d6f9eaa914202bd7
font_01_sfnt_off00010afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFB 10908 bytes
SHA-256: a33db809c13dabded6a786545fad0d528f12d16b5477a1a019d418b097d08dc5

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