Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c7f3f84d66efd9…

MALICIOUS

PDF

75.4 KB Created: 2021-04-05 11:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e2fe54de1a709ccd75ad0ad35161846 SHA-1: 1e958ad00d73cf9855ab506ac45dee162418ee6a SHA-256: 86c7f3f84d66efd93c2f33f7b2eeadbf8169ce79eaee5930fae6663a44214108
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=presentation+topics+for+communication+skills+lab+pdf
    • https://cdn-cms.f-static.net/uploads/4469834/normal_606263bddead7.pdf
    • https://cdn-cms.f-static.net/uploads/4367903/normal_601b009080225.pdf
    • https://cdn-cms.f-static.net/uploads/4418000/normal_6028b1c9864ca.pdf
    • http://nibajafij.medianewsonline.com/sifesirip.pdf
    • http://folubowavu.22web.org/cypripedium_calceolus.pdf
    • http://kulilezew.iblogger.org/11210099120.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tubafurubeg.epizy.com/kozesapimofu.pdf
    • https://uploads.strikinglycdn.com/files/02aef4f2-55f6-4714-854b-96cb040119cd/how_are_cultures_diffused.pdf
    • https://uploads.strikinglycdn.com/files/aa9caef5-00ac-4cb9-bec1-b533aa882a49/miretegip.pdf
    • https://uploads.strikinglycdn.com/files/6d5128c9-e481-4d1e-824d-65fcc77c4201/how_to_make_him_love_u_through_text.pdf
    • https://uploads.strikinglycdn.com/files/262c1c80-ee89-40e8-acb4-ec1ff9fc76b8/17943064180.pdf
    • https://uploads.strikinglycdn.com/files/1f1fe833-a9e5-4825-bce5-1824486a0917/viboriraponoj.pdf
    • https://uploads.strikinglycdn.com/files/ffd5c011-9da2-4faf-a002-a6050fbaf6cd/how_to_turn_off_airplane_mode_on_doro_flip_phone_7050.pdf
    • https://uploads.strikinglycdn.com/files/02179153-37a2-4ef3-aa9b-15c3fca115b2/63048165624.pdf
    • http://furipurisebete.onlinewebshop.net/business_strategy_of_flipkart.pdf
    • http://jetubomubiko.epizy.com/risuzebirepewa.pdf
    • http://nefemuporama.rf.gd/le_syndrome_pyramidal.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1c.bin
6966c6c870d4b1571167dea1349ddc28c45742d84011e126163b020d1e266e8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 5504 bytes
font_01_sfnt_off0000feb7.bin
19bc14330d4be55606e3c8fa72e9ed92cef46e5db51430983c189ddb9a39d3e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB7 9832 bytes