Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e10f0247ba25520…

MALICIOUS

PDF

77.6 KB Created: 2021-03-09 13:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cd609b0b655f17850518be9b140d60a0 SHA-1: 9ea9a9d2b159598be628ada35c232ee00ca8046a SHA-256: 2e10f0247ba25520fdcf1117891060330b3446991e2a8ecfd2bc4185e50a2a4e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text suggesting it is a 'dictionary worksheet'. A prominent external URI, 'https://pelibifir.ru/award?keyword=using+dictionary+worksheet+pdf', was extracted, which is likely the primary malicious payload delivery mechanism.

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://pelibifir.ru/award?keyword=using+dictionary+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413012/normal_60465f88371b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388416/normal_5ff91646e8365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463785/normal_5fdc7688499ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_602920a9a5c8a.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/kodipopujufipig/14206778959.pdfIn PDF document text
    • http://muvalinifotu.rf.gd/abzurdah_gratis.pdfIn PDF document text
    • http://dobusimosekaba.epizy.com/puzomavodokipub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64310bf-2ecd-44d0-854c-3602a41eba1d/pantum_p2500w_printer_driver_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4c8e0a-db99-46ec-b3c4-2782bf617f8d/how_many_endings_are_there_in_dark_souls_3.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/42920643793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4cd6e3-28bd-422f-bb10-2dfb6a99c6e1/how_much_does_a_3d_body_scanner_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3112a669-7746-4a27-9386-8825153c8940/polaroid_pic_300_compatible_film.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a69188-9171-41b1-a754-53541e8c161c/15724388130.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/jumping_jacks_work_what_muscles.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/properties_of_nanomaterials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9953ab4-f984-46ff-ad27-1b3c7ed8cba2/sirurexexavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2721de66-6141-4dd8-8b74-cac1e667aba1/is_strawberry_milk_good_for_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ee8029-3e2e-43d2-a3ba-2ab284681624/lgebra_de_baldor_ejercicios_106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f3e0913-8146-44f3-9e9d-aaafc2334e7f/how_many_reps_for_compound_exercises.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_off0000f336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF336 5636 bytes
SHA-256: 62d70d268d24883cf626db784e3ca47ae346f3241fb6ccf3dde1fcd3f583e7b1
font_01_sfnt_off0001067d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067D 10036 bytes
SHA-256: b9d403d8ec7aa33a7e94604a37da10950c45e730842cef6fdd6b622a41beb0ce

Open this report in the interactive analyzer, or submit your own file for analysis.