Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb50c23b6f8b396…

MALICIOUS

PDF

73.6 KB Created: 2021-02-19 07:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 28d7517723a6ec63983f430a3e22a3bc SHA-1: 364db500e1fe74422a0cca3bad0f3704cf8325cd SHA-256: afb50c23b6f8b39652b005686d6110811111ef28e79e194fab7737c1de935c6e
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded link that directs users to a suspicious domain, masquerading as a tutorial for AutoCAD. The ML classifier strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or redirection attempt to a malicious site.

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/strik?utm_term=how+to+start+autocad+electrical+drawing PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5ff48c94bd5c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_6027c8a961c2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5ff5ce95d3e2f.pdfIn PDF document text
    • http://shopeuro.pro/challenge_movie_hd_video_songqzotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_602a58003cf38.pdfIn PDF document text
    • http://copyrightprivacy.site/68067402357w1kfi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_6014038c8e6df.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/android_material_design_splash_screen_exampleowbbj.pdfIn PDF document text
    • http://italysummer.space/979605053282bw5j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451023/normal_600912cfc1966.pdfIn PDF document text
    • http://normal-id.com/515127784311swlz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_601dc3be49fef.pdfIn PDF document text
    • http://hayatevesigar.online/find_my_phone_number_iphone_8a2fi3.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/tifuwuw/sojatativebakarojazojuma.pdfIn PDF document text
    • http://velumosak.epizy.com/jisokiwepudewux.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/explanation_letter_word_template.pdfIn PDF document text
    • http://tajomum.epizy.com/lenijilisaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/adverb_of_time_place_and_manner_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/collage_maker_apk_pro.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 6

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_off0000e1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F6 5160 bytes
SHA-256: 04212f9c9555ade763c298ca65a485367c3a3d60895fe7ebc10857f6ec58cc87
font_01_sfnt_off0000f3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A0 11080 bytes
SHA-256: ced61edb7620d1899eb986c2213ee3adfb3fa706d8b1651568b4c28d36209db2

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