Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb81686038ec9ba…

MALICIOUS

PDF

77.5 KB Created: 2021-03-17 09:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e33545a1a8b4934010082278d81702ac SHA-1: 727940715748a3be1fed3b30c9bd3e443aaef222 SHA-256: abb81686038ec9bab93dee7eb951c7e5ea0c2c4fbf3ed59dd60fcd60c1ed9199
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to exploit users by luring them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/award?keyword=wire+size+amp+chart+pdf PDF link annotation
    • http://winoorama.space/queen_piano_sheet_music_musescore6x3s6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5fe0bac29418b.pdfIn PDF document text
    • http://stankoff.org/asus_rt-ac88u_issues8mx73.pdfIn PDF document text
    • https://xemizumelisiga.weebly.com/uploads/1/3/1/8/131856695/69b480f068.pdfIn PDF document text
    • http://relax35.ru/fotemisibunavepupilp56y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_60510ffd2f539.pdfIn PDF document text
    • http://lifeeuro.info/bmw_e46_differential_fluid_change_intervaloxso0.pdfIn PDF document text
    • http://legionmone.xyz/ximoseniwlrfn7.pdfIn PDF document text
    • http://fartook.online/893947207353dnxb.pdfIn PDF document text
    • http://opensucre.pro/dajenodegisi3rr1a.pdfIn PDF document text
    • https://dixotusokor.weebly.com/uploads/1/3/0/9/130968976/wenodovoseminodudij.pdfIn PDF document text
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/1766625.pdfIn PDF document text
    • http://callup.today/how_to_wear_the_powerbeats_prova2fh.pdfIn PDF document text
    • http://jilet2.club/bts_jungkook_photorrm3k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464869/normal_5ff10d27dfcc7.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/jazofi/how_to_transfer_files_to_garageband.pdfIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_aad7cfc5da3747ea9f52fdb7afa6fc37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/kathi_mela_kathi_song_in_tamildada.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/kifikuse.pdfIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_03df3231d2894f0a8279f0cde072aa6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fukepez/weather_worksheets_for_first_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/zovibabibojewoxa.pdfIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_0924c1b69871497ea1b2713ec4e4fdc8.pdf?index=trueIn 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_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 5428 bytes
SHA-256: 51e128b410836dacaa55d7ccae90064ef572e44fb051deaea911f27f21f9b411
font_01_sfnt_off00010011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10011 11300 bytes
SHA-256: 543503f0064e0051f68c7a520408342f8de66b4ff96ffd5670ec0454d8a0786e

Open this report in the interactive analyzer, or submit your own file for analysis.