Malicious PDF — malware analysis report

Static analysis result for SHA-256 619c2c99df46d36e…

MALICIOUS

PDF

104.0 KB Created: 2021-02-12 02:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 27846394db5c765e550f9c7276145d22 SHA-1: 21b4ac7b2aa3f73270354cee8952ef2a117a5b2e SHA-256: 619c2c99df46d36ed325018c2f541663387819de0fd46bdd89f41e6970314e7a
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL and the overall heuristics suggest the document is designed to trick users into visiting a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/123?utm_term=console+operator+basic+requirements+assessment In PDF document text
    • http://cadenalia.com/anet_a8_3d_printer_user_manualwnp5l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_60181ff38ca22.pdfIn PDF document text
    • http://mangalvpodarok.ru/revolico_muebles_los_desigualesuqe0q.pdfIn PDF document text
    • http://reactivaperu-2020.com/anno_2205_veteran_guidequvgi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_5ff9a56175624.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384480/normal_600312fcda3ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466370/normal_5fc75dfddea36.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/tuxalowafokuvo/free_baritone_ukulele_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/69681421534.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/google_duo_video_calling_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/lime_kiln_canyon_climbing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/acids_and_bases_chemistry_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/ralinowizobuf.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_off00015a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A2E 5252 bytes
SHA-256: 28d7647c87b3438b914cbf0d48cad7ded79f72f285503dff08d8d8a764740e25
font_01_sfnt_off00016bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BEC 11444 bytes
SHA-256: 37d1b2cd11901427ed2d5dde3829cb8ee00e224ef329db17c8fae26ff83ba059

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