Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf588033e60a3ee…

MALICIOUS

PDF

79.8 KB Created: 2021-03-29 21:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 600965cc14be0259fc0a2e3a8de9536c SHA-1: 1922559567c491d6af95ea77d95e2c560696429c SHA-256: 4cf588033e60a3ee4f77de9e27d076b24e3cadbe8cf25defa4723de0d19f6167
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 0.9993

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://bologen.ru/strik?utm_term=hero4+black+vs+silver PDF link annotation
    • http://olivamebel.com/rekifunonogetozokosufoo2d.pdfIn PDF document text
    • http://dkblogin-de.com/fumimepq2aj7.pdfIn PDF document text
    • http://idealica-ituficiale.website/ionic_bonding_worksheet_high_schoolgquxq.pdfIn PDF document text
    • http://matroskin.space/pazukesixogure6fsn8.pdfIn PDF document text
    • http://morasufas.iblogger.org/53641210144.pdfIn PDF document text
    • https://puxamosawakexa.weebly.com/uploads/1/3/1/3/131381243/kodivomafajumiz-gerafemoj-wanegedetuvos.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/vimekepope_vogogoreme_pivana_regul.pdfIn PDF document text
    • http://yellownatural.space/visto_bueno_de_seguridad_y_operacin8crxz.pdfIn PDF document text
    • https://madugonado.weebly.com/uploads/1/3/2/8/132815119/wolutebipuxan_jowaga_kepujub_xaratajop.pdfIn PDF document text
    • http://umdtheatre.ru/jusabazurepoxuxemuda1n7wr.pdfIn PDF document text
    • http://trudogoliya.online/tanaputiwulobolosumijly67w.pdfIn PDF document text
    • http://ingmijn.com/56419747290hme3g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_602ea0203a12d.pdfIn PDF document text
    • http://raisinshq.club/best_baby_name_book_with_meanings90w6t.pdfIn PDF document text
    • http://d-youtube.com/is_skywalker_deadi0cyz.pdfIn PDF document text
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/fafexibalufef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471230/normal_5fe396c4bc4eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455684/normal_600c2750d90ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/36755785877.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/acer_aspire_switch_10_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/how_do_you_deal_with_conflict_in_nursing.pdfIn PDF document text
    • http://jabujiwotase.epizy.com/savuwuk.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/historical_timeline_template_ppt.pdfIn PDF document text
    • http://bevowamudad.epizy.com/2017_maserati_ghibli_s_q4_performance.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_off0000ed3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3D 5104 bytes
SHA-256: e1b4505bec39bdf167e61815ef0a260087de4b3a21fb0912526ab41dfb16e31c
font_01_sfnt_off0000feb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB2 16044 bytes
SHA-256: 8c9963fc323f2e7a552c3a1b42d9faa34f65ad1166c1cf558d308b6fe63e1a58

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