Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb4dde3fa073b6d…

MALICIOUS

PDF

88.6 KB Created: 2021-05-17 01:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eb226935d942a92101a44f53c5ea7643 SHA-1: 7350de9e4676a2a6e25b32ba614f227792b86eec SHA-256: ccb4dde3fa073b6d8ccf465cdb187b559e7bfc8cf017351deff84c80eb0f0dd7
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 0.9996

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://zajinet.ru/strik?utm_term=how+to+find+a+rental+broker+in+nyc PDF link annotation
    • http://gunofixe.medianewsonline.com/free_bass_guitar_tabs.pdfIn PDF document text
    • http://majusenise.sportsontheweb.net/unity_animator_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/silijebutu/cjbjbjb/jitaxosata.pdfIn PDF document text
    • http://nosetibadap.iblogger.org/mewunegoviwanofametaw.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/ZPhgSjj/jumpstart_kindergarten_app.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/nisamunedusideke.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/conair_hair_clipper_guard_sizes.pdfIn PDF document text
    • https://cdn.sqhk.co/ragebobeb/pig0lhc/kebuga.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/98198194327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://josekew.epizy.com/6.4_traits_genes_and_alleles_power_notes_answer_key.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/tikefitafofowavixew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525b6d0b-f61e-429f-ab36-6f1e19a8c8ac/law_of_attraction_michael_losier_free_download.pdfIn PDF document text
    • http://bizedesaxifu.onlinewebshop.net/assistant_commandant_question_paper.pdfIn PDF document text
    • http://xaramoturowuf.rf.gd/present_simple_future_tense_exercises.pdfIn PDF document text
    • http://rodesodekisivu.rf.gd/citadel_income_fund_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6866ba7d-ba0d-496e-9c83-cc52b0bfbd0b/suvosubefo.pdfIn PDF document text
    • http://bajipogijos.epizy.com/get_a_cup_of_tea_meaning.pdfIn PDF document text
    • http://rozipiliwune.epizy.com/narasibolimivo.pdfIn PDF document text
    • http://zuzogit.rf.gd/duzuxenakixifaroxivizole.pdfIn PDF document text
    • http://lupidew.rf.gd/1333200617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0625c94d-790c-49eb-a7e0-33171ebbd17f/38761258822.pdfIn PDF document text
    • http://mutodilevo.epizy.com/pijizuvenivekivejolowix.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_off00011e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1F 5196 bytes
SHA-256: ed9bb100442b2943264dc70721ef89907d25e28c6fd97a429f59badeee9e63b1
font_01_sfnt_off00012ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF5 10820 bytes
SHA-256: 386dba24101af8a740a5faae9b2756b86f0ff298d6825c2d9fb430b1b1932992

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