Malicious PDF — malware analysis report

Static analysis result for SHA-256 be53a441a903a845…

MALICIOUS

PDF

70.0 KB Created: 2020-12-19 00:51:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 444162c3617a9371a759f60d446dfc8f SHA-1: 1380c8f5a8b86b3edfb6a0de655c335d3b43b267 SHA-256: be53a441a903a8450895cd8eee71f0f882876887cbe604a5013e93b1627a5a58
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a phishing lure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL and the document's likely intent to trick users into visiting it suggest a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?utm_term=adverse+drug+reaction+form+health+canada In PDF document text
    • https://static.s123-cdn-static.com/uploads/4377674/normal_5fc3faa403d7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483836/normal_5fc22db39307c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5fa79e1de0fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487632/normal_5fc0bccd99634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5fd64db39f4cf.pdfIn PDF document text
    • https://topagolidokade.weebly.com/uploads/1/3/4/5/134502990/wijototimogevuk.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/lorifumofelu/70234386971.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/kiganezosoxaripew.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc69409ec917750a3fee43c/t/5fca9d1b9f842a6728bd0345/1607114011673/24171145073.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9da7ff99f865bfec24a0/t/5fdd27947514fb3b762785cf/1608329110305/dakogifababajekujitasaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4426d950-83a2-4156-8671-cbd4f41291c4/libro_administracion_de_sueldos_y_salarios_agustin_reyes_ponce.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/rosurafebizefesovun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f7759d-7372-4984-974e-1da4823f678c/article_l324-1_du_code_de_la_scurit_sociale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a165f1-4f97-4ef6-8e60-1d18c5c0f04f/the_links_at_plum_creek_resident_portal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/499234bb-4bf8-431c-84d9-cfc6a0d4e3bc/64899609082.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_off0000d5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A9 5484 bytes
SHA-256: 208b458aaea2ea15f68c06ab4ab5bd11cf1f9bef2158470a4fd9126a425bd9ed
font_01_sfnt_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 10332 bytes
SHA-256: 8ee2e73d9a64d02476139cfbfdc01b1ff51bc717c21e7e009e593f462cd93496

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