Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ce56d2430e0845…

MALICIOUS

PDF

276.7 KB Created: 2020-12-28 05:53:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 15cd50c7e705170ac58dd3e8cbd45aab SHA-1: e8ab5337efe79d218a953e101f42c2d9b8fe745f SHA-256: e8ce56d2430e0845ed1cac0e7ea0fec9ac14be1d4dddac8df4fbe9c03784970a
170 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it's a phishing or trojan delivery mechanism. The presence of a link to known malicious redirector infrastructure, combined with heuristics indicating urgency and a call-to-action, strongly suggests a phishing attempt. The document body, though heavily obfuscated, contains text related to medical guidelines, which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/aws?utm_term=acute+coronary+syndrome+treatment+guidelines+2017 In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/xidulugetewejik.pdfIn PDF document text
    • https://nuzuloluxeguvox.weebly.com/uploads/1/3/4/8/134874948/97d7a300c51dc4a.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/921d24c3918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527108/normal_5fbdbf84a077a.pdfIn PDF document text
    • https://vejegiraforid.weebly.com/uploads/1/3/4/3/134311029/legonenezerusatuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5fb7ae404cb1b.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/lorawabifusi.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/rawesaragegugar/pokemon_ex_gx_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b00664-694a-4ac8-9902-5395714f0bff/jutoluvubufegekezur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a942c32a-a743-4147-9cb3-d64ff7308522/wekavumejibifotatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0b6e7c-f567-4c1a-af8d-a30a84f4333d/starcraft_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df4c94c-6c2d-4177-8d9a-64ec10ca6f26/dinosaur_simulator_dino_world_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91075bbc-771a-4b71-94e8-3cf584c1c52c/58876761649.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F0B0 5756 bytes
SHA-256: 7217ecdbbbc5f86ce890708f84b5923454253f5db0423d86f915ba29e2c1e0ce
font_01_sfnt_off0004044a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4044A 12796 bytes
SHA-256: 9e280b021dc7d31c95be76b9f93e07ab3989b74384265fefe10af83caa862cff
font_02_sfnt_off00042d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42D89 16320 bytes
SHA-256: fc21d13ef889798d4059463ba7b54baba92ab97afa2386036c0d336ec5e4fb63

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