Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec47416bee7706c6…

MALICIOUS

PDF

75.3 KB Created: 2021-02-23 05:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f9ace00bf294f3dc45ed3ca94ff7b14b SHA-1: e12a58f8ac38b217e16cacc288723abc76da675d SHA-256: ec47416bee7706c65c2e5fc35d3a8343e16c116ea24c8eb0c8e9ffce5d893462
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The embedded URL and the document body text, which appears to be garbled or obfuscated, further support the phishing and link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=what+are+the+three+genres+of+literature+pdf PDF link annotation
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/velazivuwe.pdfIn PDF document text
    • https://rexakutomas.weebly.com/uploads/1/3/0/7/130739652/8624068.pdfIn PDF document text
    • http://bred-enligne.com/segekebopokowsl31.pdfIn PDF document text
    • https://verulezame.weebly.com/uploads/1/3/0/8/130814285/mewetati-tijol.pdfIn PDF document text
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/6514026.pdfIn PDF document text
    • http://handler-autoscout24.com/moisten_crossword_puzzle_answerp2jxi.pdfIn PDF document text
    • https://lusekovipe.weebly.com/uploads/1/3/4/2/134234723/valajukuviket.pdfIn PDF document text
    • http://gutprod.xyz/banglarbhumi_app_for_pcfil0v.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/affixes_worksheet_grade_43b7ur.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/jifgigi/brocato_s_sandwich_shop_tampa_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvuwisarov/hbqbLhL/love_island_usa_season_2_schedule.pdfIn PDF document text
    • https://seporarutigofu.weebly.com/uploads/1/3/2/7/132741198/piketewopadafapisa.pdfIn PDF document text
    • https://vafobuzegigotot.weebly.com/uploads/1/3/0/7/130775214/097ae.pdfIn PDF document text
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/207423.pdfIn PDF document text
    • https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/sarusux_gazopofadir_mararafujapu_xoloroj.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/free_mcat_study_guide0sbre.pdfIn PDF document text
    • http://merishwheelrecords.com/pefozeturipeleroduxolonia8h6j.pdfIn PDF document text
    • http://indonesia2health.online/watch_friends_season_8_episode_6_onlineamsy2.pdfIn PDF document text
    • http://andyhongdigital.com/barfi_movie_all_song_ringtoneudqvw.pdfIn PDF document text
    • https://wufisosudima.weebly.com/uploads/1/3/0/8/130874090/d9ed5952e0c3a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 5316 bytes
SHA-256: 02e42bfedd878d5886d3645269b162ce84c5714b291266e9a2a681eb3a9aff62
font_01_sfnt_off0000fc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 10320 bytes
SHA-256: 39f12d4093170f38f6c329a41d3cdf8c13cd8e10b51c7b65c197d2c215cedfcd

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