Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d09019dec25223…

MALICIOUS

PDF

73.4 KB Created: 2021-05-08 17:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a8ee422a20bb8ba970af2661b093f3e0 SHA-1: e80c819f7966c7a9dc4a1dbaff62615ebe257f61 SHA-256: b8d09019dec25223428b92ead8841a0eed605fd72a3f2021d3c5bf6f2e80a62f
126 Risk Score

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 flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://botokaw.ru/strik?utm_term=where+is+mode+button+on+ti+30x+iis PDF link annotation
    • http://pedron.fun/88355588157x4hjb.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/cWOjdje/rixon.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/ejjjhxe/voting_presidential_election_2020_date.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/IBjdijL/72525504217.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/jhwigwd/wopazavifujadanum.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/tautology_in_discrete_mathematics.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/jaijVcr/nail_salon_in_the_mall_prices.pdfIn PDF document text
    • http://pochta-24.cc/scag_36_price305hc.pdfIn PDF document text
    • http://zoomita.fun/93680237961l8jom.pdfIn PDF document text
    • https://cdn.sqhk.co/sanobude/aZt45pl/52236847822.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/cih3hdO/brown_leather_couch_interior_design_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/sodovokak/jcgeoZA/86583931950.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/caelum_java_apostila.pdfIn PDF document text
    • http://gamedv.design/james_patterson_books_in_order_of_release_daten5cwe.pdfIn PDF document text
    • http://takipleskazan.org/is_the_stock_market_on_christmas_eveat1sw.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/bhagavad_gita_translation_in_marathi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xisefowu/blender_2.83.1_tutorial.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/telugu_baby_boy_names_with_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/websites_to_movies_quora.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/20674419340.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C1 5232 bytes
SHA-256: 376d0ee0d3b32504df3332db70278448e51baeb7d658e5f22c8cc8399a70a624
font_01_sfnt_off0000e375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE375 11272 bytes
SHA-256: 0c94d84679216f576ae6b96fe5b283a8dd36e12f68f5d4b34000e5deb22299b5
font_02_sfnt_off00010a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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