Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb52a1dbe395818…

MALICIOUS

PDF

84.0 KB Created: 2021-01-23 01:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9b4aedda215c85a45c80a4b067230c7f SHA-1: eef9e352ad5c8e31639b59b4577487dec7a01f4b SHA-256: 6eb52a1dbe395818672e9a842f79b1dc386486b65618bb824b64199c36d244b4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/aws?utm_term=animedroid+apk+descargar+gratis PDF link annotation
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/3226285.pdfIn PDF document text
    • https://cdn.sqhk.co/digiwejasipu/5WPAPgc/2d_strike_mod_apk.pdfIn PDF document text
    • https://site-1176184.mozfiles.com/files/1176184/algebra_2_regents_answers_explained.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/aihhcK8/buwefudojinupisap.pdfIn PDF document text
    • https://site-1176253.mozfiles.com/files/1176253/44730730863.pdfIn PDF document text
    • https://zobojosapez.weebly.com/uploads/1/3/1/4/131483592/nizaxakofavezerinewu.pdfIn PDF document text
    • https://site-1176067.mozfiles.com/files/1176067/beethoven_s_3rd_full_movie.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/lirorafiti-xilokofeji-benisigat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501356/normal_5fc9d8b690588.pdfIn PDF document text
    • https://jesipawuba.weebly.com/uploads/1/3/0/8/130874316/684797.pdfIn PDF document text
    • https://site-1168052.mozfiles.com/files/1168052/new_bollywood_movie_free_filmyzilla.pdfIn PDF document text
    • https://site-1171969.mozfiles.com/files/1171969/best_survival_crafting_games_xbox_one.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454543/normal_600a1e10aadbe.pdfIn PDF document text
    • https://fawirato.weebly.com/uploads/1/3/5/3/135392883/tijogot.pdfIn PDF document text
    • https://wutusexiradolo.weebly.com/uploads/1/3/0/9/130969471/7870768.pdfIn PDF document text
    • https://site-1166082.mozfiles.com/files/1166082/kibizugibud.pdfIn PDF document text
    • https://cdn.sqhk.co/fexonawizoz/hIXijgi/soccer_stars_2019_game_guardian.pdfIn PDF document text
    • https://site-1175201.mozfiles.com/files/1175201/us_civil_war_2020_youtube.pdfIn PDF document text
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/242062.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 5412 bytes
SHA-256: ba38589c3dec1d5a41c287fc82900882c0120465148e63b0771921abe819700a
font_01_sfnt_off00010741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10741 11564 bytes
SHA-256: 3cf35d7e61d478be83e3ce296f3087086bd327344e12482ed6e3ca17403ea660
font_02_sfnt_off00012d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D41 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d