Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7dade754102696…

MALICIOUS

PDF

70.3 KB Created: 2021-02-21 02:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a754448833f8fff599c15bb4efc9be54 SHA-1: 0861486af5c6ed51c3cce9caaccbed27f5271506 SHA-256: ae7dade754102696f1097083fd726847197d931f1e2afd57025e934157872444
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URLs pointing to potentially malicious content or phishing sites. The presence of many links, including those on disposable hosting, suggests an attempt to distribute malware or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=cheap+but+cute+baby+girl+clothes PDF link annotation
    • http://flash-sar.online/pulivisigiboruvipqarig.pdfIn PDF document text
    • https://cdn.sqhk.co/lafugafeniki/idggTgc/super_boy_adventure_eurics_saga_platform_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/jjUjb6E/89183211099.pdfIn PDF document text
    • https://nakefofomiruni.weebly.com/uploads/1/3/4/4/134483242/xitopatini.pdfIn PDF document text
    • https://gegivibubijob.weebly.com/uploads/1/3/4/5/134507206/2562053.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/Fieinhv/fugotuvavux.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/jgjioE8/radioactive_movie_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/IUHbiit/quran_in_english_and_arabic_book_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jgDpGji/78572935157.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/geMeBje/3938418846.pdfIn PDF document text
    • https://juduloto.weebly.com/uploads/1/3/5/3/135323899/6a71461.pdfIn PDF document text
    • https://cdn.sqhk.co/xevezele/aa4BpPd/tozolax.pdfIn PDF document text
    • https://fajalosi.weebly.com/uploads/1/3/4/9/134901252/laxuledujusimimox.pdfIn PDF document text
    • http://lumacy.site/how_much_does_midnight_sun_costg8ce9.pdfIn PDF document text
    • http://bossyonlinex.com/entretien_dembauche_en_anglais_dialoguegid5w.pdfIn PDF document text
    • http://new-volosi.ru/2016_ap_biology_free_response_answers_question_51admc.pdfIn PDF document text
    • http://rikuximuvo.iblogger.org/26581191184.pdfIn PDF document text
    • http://aviabileti.ru/behance_fonts_free3gkj7.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/cIM8T21/aplikasi_no_crop_video_instagram.pdfIn PDF document text
    • http://frut-tree.site/xexujekapiftp0oh.pdfIn PDF document text
    • http://ostanni.fun/41248006984s50df.pdfIn PDF document text
    • http://helpcopyright-service.com/la_valse_damelie_piano_sheet_music_freed1dns.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E2 5340 bytes
SHA-256: 884dda71c5284ae6ddcef8332bd6ea532bccc11d4018af30f1e7154483f62381
font_01_sfnt_off0000e809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 10420 bytes
SHA-256: 0931b9e5aa627ac299ff30d126fef544d7cafb5327848ae335fa1dcc4792768b

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