Malicious PDF — malware analysis report

Static analysis result for SHA-256 4033fe7479a26657…

MALICIOUS

PDF

74.6 KB Created: 2021-04-07 03:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e47170dc5f74a97f4d482ad43ecb2f4 SHA-1: d4b16d768fe3f29141bd7164d843cae294048634 SHA-256: 4033fe7479a2665767e819f651f0224172552673ef6cbfb0ddd62f8de0f7527f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=larry+david+net+worth+forbes PDF link annotation
    • http://zodelem.mygamesonline.org/lewis_dot_structure_for_ionic_compounds_worksheet_answers.pdfIn PDF document text
    • http://contarinihome.com/vewukibofaviwilojunubote34lkp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_602ded81af4cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5fd0efd79d969.pdfIn PDF document text
    • http://libidisebosuv.22web.org/conjunctions_and_linking_words_worksheets.pdfIn PDF document text
    • http://quickstore.pro/advanced_french_vocabulary_listjzg4e.pdfIn PDF document text
    • http://glawerry.online/war_and_peace_bbc_watch_online_with_subtitlespidnd.pdfIn PDF document text
    • http://storergoods.site/whats_a_good_300m_hurdle_time7wggw.pdfIn PDF document text
    • http://siluvuxifebul.medianewsonline.com/99888277717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5fe971872a2e5.pdfIn PDF document text
    • http://rezuwalep.iblogger.org/50623139383.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/rojovifotixoxixo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_31b827af169744daa2e87ae2082e9248.pdf?index=trueIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_a72a0e7f0a5f4718b28235409c7d80c0.pdf?index=trueIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_bb1dab56eea145c6bb573fdcac885ef9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/the_sun_in_the_morning_time.pdfIn PDF document text
    • http://semagovolabak.rf.gd/burglar_bill_story.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/zakutikolufikeliburab.pdfIn PDF document text
    • https://1e35b969-1f99-48dc-8aa8-d0fb9638bdc8.filesusr.com/ugd/970baa_2d54aaa825554ad88d50bbdb75f51038.pdf?index=trueIn PDF document text
    • http://kirawolus.rf.gd/application_low_level_design_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/logo_quiz_answers_level_319.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

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_off0000e375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE375 5300 bytes
SHA-256: e4e25d9d567e297ac8ac2cbc0123dc8f04f9e78f4a3fe6787e353fecd8d19e17
font_01_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 13484 bytes
SHA-256: b7a72d9883a5de8f7fae1f73caa8d10962bf1c1d52adcdd9f813b18cf78f4c2c

Open this report in the interactive analyzer, or submit your own file for analysis.