Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d70ba93688dc30…

MALICIOUS

PDF

76.6 KB Created: 2021-01-18 05:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e8717943ed50548e0a0a11075ae8b5ca SHA-1: 91c3138543da483f566b9cdf17718c0bd628d317 SHA-256: d6d70ba93688dc30ff2ae94d1410a3895622ff1f81840a7029deb9d6ac8cf155
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a high concentration on disposable hosting services and UTM parameters, indicating a link farm or phishing lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious sites, likely as part of a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffset.ru/123?utm_term=orange+crush+pro+120c PDF link annotation
    • https://pimidunobesuxig.weebly.com/uploads/1/3/0/9/130970022/3782403.pdfIn PDF document text
    • https://site-1166595.mozfiles.com/files/1166595/lewebonevulukamudu.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/3837160.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/8174021.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/jhPbHia/85260421446.pdfIn PDF document text
    • https://nigoriwidoke.weebly.com/uploads/1/3/5/2/135296580/1a84e73f7aa7.pdfIn PDF document text
    • http://pipexob.66ghz.com/10787495977.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/9707659.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/sonutopexaramuf/shiva_aghori_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/winnie_the_pooh_fabric_flannel.pdfIn PDF document text
    • http://xexelakufakeze.epizy.com/usg_guided_liver_abscess_aspiration.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/rutiluxowezanixaw.pdfIn PDF document text
    • http://dunedobaxapekir.epizy.com/anatomi_hernia_inguinalis.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/maliludidolajepob.pdfIn PDF document text
    • http://vezapuro.rf.gd/web._config_credentials_passwordformat.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/maribokuvudage.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/69178085414.pdfIn PDF document text
    • http://notaruk.rf.gd/puduxetebemas.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_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 5516 bytes
SHA-256: cf6d4d844d3def3422499638c446508333b22c9195fcc430f7048ba6be775a11
font_01_sfnt_off0001007f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007F 10736 bytes
SHA-256: dc78b18b6ef1d30006fea36c90f8c0d70aaf5c7cab5da3670f8635202df96d33

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