Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb76d1c0924bab82…

MALICIOUS

PDF

68.4 KB Created: 2021-02-10 19:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3ed61bc01390cff5711fbd4e170c7cf6 SHA-1: 24bdf67bb6491cb722deeef21e0d4b6f2265e6c9 SHA-256: fb76d1c0924bab8257bc4cc6ec11203267446dc2582691407364eb61722cb61d
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 likely used for phishing or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/aws?utm_term=free+church+newsletter+templates+microsoft+word PDF link annotation
    • http://easterthjg.com/danodakzrhy7.pdfIn PDF document text
    • http://twenty-promo2020.ru/ritikubaxukoxesexusobozdhgq7.pdfIn PDF document text
    • http://ibkreactiva2020.com/miraculous_ladybug_season_2_english_dubaw0l7.pdfIn PDF document text
    • http://ogranicbio.space/karakai_jouzu_no_moto_takagi-_san7vbdk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://metoduzudo.rf.gd/information_technology_consultant_cover_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/adobe_acrobat_reader_full_version_apk.pdfIn PDF document text
    • http://bulujulu.rf.gd/cariotipo_humano.pdfIn PDF document text
    • http://dabirojab.rf.gd/63066614381.pdfIn PDF document text
    • http://pagiwufuvefukuf.epizy.com/bhavesh_joshi_superhero_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/66583432168.pdfIn PDF document text
    • http://bilozepe.rf.gd/xetonotipapa.pdfIn PDF document text
    • http://xofafatererowu.rf.gd/razuwotuxuzokovujo.pdfIn PDF document text
    • http://fubegamo.epizy.com/biometric_device_driver.pdfIn PDF document text
    • http://zezajezo.epizy.com/vebivelavaxadizaje.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/gba_emulator_games_for_android_cheats.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_off0000cebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBF 5440 bytes
SHA-256: 6b2515c8b48a7db6f113f7a4227dd8aeeda8ad4444b242d3bfa490f393cffff3
font_01_sfnt_off0000e12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 10268 bytes
SHA-256: 39ed21f027eae1c3d906399c8133b156f381efbf28ffacafcbe17d75c7e6fcb3

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