Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b0a66957900a66…

MALICIOUS

PDF

79.3 KB Created: 2021-04-10 12:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 42faf3fe78028ca6d857d0323a785e67 SHA-1: eba1cec55b3e770328341d68ee2dce482782cb4a SHA-256: f0b0a66957900a66689fcf58116377b123bd3bc8cf173771ab379fb610d74c4b
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to download further payloads or redirect to phishing sites. No scripts were extracted from this sample.

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://kuzutuzo.ru/strik?utm_term=what+does+2+3+zone+mean+in+basketball PDF link annotation
    • https://cdn.sqhk.co/bapisolel/fJ10u9v/brawl_troopers_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/eaBFyjf/instagram_gain_followers_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/luxanimev/2YOWs59/police_pursuit_policy_queensland.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/hchagel/cat_condo_2_game_all_cats_list.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/gd9XjaK/ordinary_grace_plot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498366/normal_6009043b8fdf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fcea1f485f21.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/bbc_compacta_class_11_english_solutions.pdfIn PDF document text
    • http://nanolenka.xyz/is_annabeth_in_the_son_of_neptuned98o7.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/hghbIDU/66541056135.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/99_year_lease_agreement_sample7ta7a.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/hgjisHK/unduh_fire_free_battleground_survival_hopeless_squad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_60686393d4c19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_6026903a9b89d.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzujugasije/LiiWsOa/alligation_and_mixture_concepts.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/which_g_shock_is_bestmijt8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_601950f69fb52.pdfIn PDF document text
    • http://makelemeg.mygamesonline.org/define_epistemology.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/zufaxepixiguxax/94458157599.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/kumasub.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A2 5532 bytes
SHA-256: cf013bc3908f76fc4e2570b468919249c43e71f53ddc3ba00700f67e15ca6f22
font_01_sfnt_off00010b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5E 10668 bytes
SHA-256: 45a9ec6fef88a114c86c7282aa1367a1ce44da09984378a06374047533856132

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