Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d322e9a8ce3595e…

MALICIOUS

PDF

77.1 KB Created: 2021-04-18 14:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3a7737218f45043f74802e0432b52527 SHA-1: 118602149f1583cb7d3fdb1f2ef47eb319a7696e SHA-256: 5d322e9a8ce3595ec5994c1d116357eed1f260020f8b454f27d2b9850d36d9c6
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, appears to contain product-related keywords and metadata, likely serving as a lure to encourage clicks on the malicious links.

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://midufefew.ru/strik?utm_term=audio-technica+at-lp60bk-bt+turntable PDF link annotation
    • http://neluvukod.22web.org/adjectives_adverbs_exercises.pdfIn PDF document text
    • https://gipavenox.weebly.com/uploads/1/3/5/9/135966662/danukotebugek.pdfIn PDF document text
    • http://mimamiva.iblogger.org/arifureta_light_novel_indo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464323/normal_600f51ad60e01.pdfIn PDF document text
    • http://zebinoleruf.iblogger.org/87669073725.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/zuxatapabikesagaxaxobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488130/normal_6065816e796f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_601f62853e0a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470526/normal_606d6b626ccf9.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/tiwawomepesodobamodemupe.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/4247270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_6068aade38058.pdfIn PDF document text
    • http://vuvopogawuxaxax.22web.org/46645483065.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bekokapag.rf.gd/how_do_you_reset_the_service_engine_soon_light_on_a_nissan_sentra.pdfIn PDF document text
    • http://jebujuv.rf.gd/mowuxipep.pdfIn PDF document text
    • http://pofutujasex.rf.gd/duzivijokoranujemakov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c73b52b3-d06e-4893-80cb-f75ab8f81557/79581758398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce82d74-d688-4997-8e21-f26108b738cc/how_much_room_for_a_shuffleboard_table.pdfIn PDF document text
    • http://gugidopesuv.rf.gd/befasumarabiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f57dae8-09ff-4fa1-9a31-2513217643b6/irobot_roomba_620_service_manual.pdfIn PDF document text
    • http://jokosen.atwebpages.com/excell_pressure_washer_pump_vr2522.pdfIn PDF document text
    • http://vekamodadon.onlinewebshop.net/mito_definicion_y_caracteristicas_para_nios.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_off0000ee65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 5504 bytes
SHA-256: f94ba4cd13e1fb0e2334dc2d62de148c5876abc4c28e790386b4115dacc84279
font_01_sfnt_off00010115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10115 11368 bytes
SHA-256: 7666558e7e1b3a2381c85066a87d18f37687bf8ceea53ced70df16f3aad51331

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