Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0f95595d2c5595…

MALICIOUS

PDF

176.9 KB Created: 2021-02-26 18:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4c3a13cb34e3be6956dbfbc90b5f6bb7 SHA-1: f2260600e08b31ee75e6dc108000db6edfe1a98b SHA-256: 4e0f95595d2c55951aae2d9e670be78373988b0999dcc98bcee09c8e8e87d9f9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://jacksth.ru/strik?utm_term=create+a+timeline+in+word+2003 PDF link annotation
    • https://gugeropufil.weebly.com/uploads/1/3/0/8/130874104/regibofigedolemir.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/hfljiih/sad_song_ringtone_download_2020_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/ighfqjj/implosion_never_lose_hope_apk_data_offline.pdfIn PDF document text
    • https://fepiwifir.weebly.com/uploads/1/3/4/6/134676425/dunozo.pdfIn PDF document text
    • https://pikupazu.weebly.com/uploads/1/3/4/5/134577858/4039724.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/ejhLjjy/86021649064.pdfIn PDF document text
    • https://cdn.sqhk.co/momogajopi/icig4ji/escape_game_50_rooms_3_level_20_dentist.pdfIn PDF document text
    • http://realnoe-obshenie.online/nekivadovapojkyjd3.pdfIn PDF document text
    • http://stixlife.info/88531542733okpfy.pdfIn PDF document text
    • http://jaxarupilej.22web.org/dedudefi.pdfIn PDF document text
    • https://kexujutexaz.weebly.com/uploads/1/3/1/8/131858540/0bffbb6cce2b6b1.pdfIn PDF document text
    • http://trackengine.host/best_self_propelled_lawn_mower_2020_australia1qhi5.pdfIn PDF document text
    • http://amorexpo.com/koriziqd6b4.pdfIn PDF document text
    • https://galanopudaxu.weebly.com/uploads/1/3/4/1/134109153/6a4201cb76ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bujozedaworora.epizy.com/application_lost_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/bus_stop_movie.pdfIn PDF document text
    • http://zukewanika.rf.gd/rowos.pdfIn PDF document text
    • http://tatasuvuputo.epizy.com/app_store_free_games_for_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/tamil_brahmi_script.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/animated_icons_free_after_effects.pdfIn PDF document text
    • http://xuzatazuji.epizy.com/47075916080.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/summon_monster_pathfinder_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/52539257918.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F63 5228 bytes
SHA-256: 41d4175e2fb7f6aa1d6674682977c0e94356a86c586a6682a08e88058e6fb97b
font_01_sfnt_off00029124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29124 10884 bytes
SHA-256: 95e64e0d0656d7f574f4c76764bb852cd683635fb44c67a91ee7d9fcbbcccc70

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