Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc024d74d93ba2a…

MALICIOUS

PDF

76.7 KB Created: 2021-02-14 06:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3abe729b3f585db4f0dc1f45632f6741 SHA-1: 1af6555c5e2a5f20ac064bd0c89c16e50c1a81e6 SHA-256: 7cc024d74d93ba2af27f0a566282cc9c71e9922c697b04d65d22a0f4c76a7ac3
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier strongly indicates maliciousness. The presence of multiple external URIs suggests an attempt to redirect the user to malicious sites, likely for phishing or malware distribution.

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://seumenha.ru/aws?utm_term=informer+tv+series PDF link annotation
    • http://buyervannakupitvsem.xyz/world_clicker_idle_clickern1fr5.pdfIn PDF document text
    • http://123dutch.com/authentic_sharpened_katanal166d.pdfIn PDF document text
    • http://nukicew.xyz/kepatumulinojjdkc.pdfIn PDF document text
    • http://vigastlens.xyz/movimiento_parabolico_de_caida_libre_ejercicios_resueltosnhd5w.pdfIn PDF document text
    • http://sdek-24.cc/sedunewi9sc9l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_6027ec90db2af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_5fea08f0989b9.pdfIn PDF document text
    • http://dektesheff.xyz/15035932006tesla.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447646/normal_5ff3226dc70fd.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/jdEgehf/37683642859.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/shjiajc/subway_train_adventure_2016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384296/normal_5fc66ad48b5e5.pdfIn PDF document text
    • http://oneplusonemain.xyz/56460456838ip36v.pdfIn PDF document text
    • http://4gusevshop.website/avesta_vendidadwlwfo.pdfIn PDF document text
    • http://imm-shoes2.club/16569537569tk0nf.pdfIn PDF document text
    • http://yesnutural.space/wajogenokemulasufidgpznk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413363/normal_5fdd7d6b6aa63.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/epviajc/v-_model_vue_not_working.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF092 4668 bytes
SHA-256: d2c8142f9986f8c20e973392b88aef93b8955999092d61dbd8987587b808082e
font_01_sfnt_off00010065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10065 11004 bytes
SHA-256: 6700f793f1cdc2faadc98c74974f9064cc466e647b4b2d9815330150ee96253c

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