Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb572f3229fe5fce…

MALICIOUS

PDF

73.5 KB Created: 2020-11-27 11:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d0f6746b52ec7fee70e457594f5593e1 SHA-1: 31aec6288feedbe62003bed196d25f245595ce92 SHA-256: fb572f3229fe5fceb66d48c4c14545cdf8ccdf03ca8f18ee26c839d629432bb6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The ML classifier also flagged the PDF with high confidence. The embedded URL points to a known malicious redirector, suggesting an attempt to lure the user to a malicious site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ggtraff.ru/strik?utm_term=god+is+my+everything+lyrics+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_5f9a3ccbd4a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_5fa1c1e91d09b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f8fcfa5a0417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5fb25b2f69031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_5f9a5eae2ace3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f726c71-2ce1-47ba-a9b0-471fced069e4/what_numbers_equal_36.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/64755550259.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/96281122145.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/sapakufuv.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/24831300232.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/auditing_and_assurance_services_11th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3240c240-27db-47a7-bdd7-781b2818da99/xiaomi_door_sensor_home_assistant.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/folding_knife_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/immersion_rod_water_heater_buying_guide.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 5476 bytes
SHA-256: 67cda31cc3de7d2f730485f153f183b335daacdd2eab3eff0e255f9ea95ee082
font_01_sfnt_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 10328 bytes
SHA-256: 7e31c897f6266155ecbdca714a166ff78f68c584b03ebc7ae3e5e802eeac7d55