Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ce0740cc8bff2f…

MALICIOUS

PDF

78.6 KB Created: 2021-03-05 19:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1549e97ad4b4fa490d7bc3116ec41067 SHA-1: 1185ddf64ef9d01418ddd1dbe01c8a13300c535c SHA-256: b2ce0740cc8bff2fb86d0b470866c440644c23e8fa6b3b54173c9ea320a8e66c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or redirection scheme. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • 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 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://baarspo.ru/aws?utm_term=how+to+tie+figure+8+knot+boating PDF link annotation
    • http://good-production16.site/migubaxopeborokorikeleviqhl5g.pdfIn PDF document text
    • http://duplicwcnj.space/the_crown_season_1_episode_4_redditxjot4.pdfIn PDF document text
    • http://memisada.mygamesonline.org/all_marketers_are_liars_book.pdfIn PDF document text
    • http://uaportal.site/aflatoxin_m1_in_milkatpzd.pdfIn PDF document text
    • http://navalny.design/zekozagw69t.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/51235614301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454045/normal_603849fa891fe.pdfIn PDF document text
    • http://bred-enligne.com/8133306956w611m.pdfIn PDF document text
    • http://nikaold.site/craftsman_professional_6-1_8_in._jointer_planer_manual46786.pdfIn PDF document text
    • http://smartcreditscore.info/how_to_make_a_disappearing_nine_patch_quilt_blockjfotd.pdfIn PDF document text
    • http://hookup157.site/17261104790a3z3l.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/2932876056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_601ad5a63acba.pdfIn PDF document text
    • http://interbankdigital.com/sony_vegas_pro_12_crack_serial_numberxrfdk.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/what_does_cronbach_alpha_mean.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416151/normal_600286339bf90.pdfIn PDF document text
    • http://reduslim-buy.site/how_to_repair_a_battery_chargern9igp.pdfIn PDF document text
    • http://dronextactical.xyz/corporate_governance_framework_template_ukjre35.pdfIn PDF document text
    • http://ukranews.icu/87309862143gdgq7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_601e15432c1a4.pdfIn PDF document text
    • http://liketime.online/berlitz_english_test_answersmxt3k.pdfIn PDF document text
    • http://berkeciftci.net/how_long_is_training_for_navy_sealsnhl9q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505358/normal_6001aa4b0273b.pdfIn PDF document text
    • http://usejus.pro/significado_del_titulo_de_la_novela_cronica_de_una_muerte_anunciada56p8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_20ba74b76c30489b9fae2eb87e3c1917.pdf?index=trueIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_3f3a6a604498474392aa114df777e4b8.pdf?index=trueIn PDF document text
    • http://zejibanunepi.myartsonline.com/fazejuk.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_off0000f82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82F 5176 bytes
SHA-256: 10f63cbfb647997510bbab5f2c73c8ccb5b91ad112022613e10bba60981ef9e6
font_01_sfnt_off000109f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F9 10040 bytes
SHA-256: 7ebecaf13bb73b64053f02e42b3f59e179f7c90bbd3c3eac156ec85936079ef4