Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc8c60f6e8bacfb…

MALICIOUS

PDF

67.1 KB Created: 2021-03-16 13:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 91446a80afa4555e0db9d78bc5d16655 SHA-1: e45d7f32be1203d5ade0d5755f7bd901ab71aa2e SHA-256: 9dc8c60f6e8bacfb385fe32d92406963a6ee9ac34102b3f8e0d4b6067e52cd9e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'gimoguvi.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though heavily obfuscated, suggests a lure related to educational materials, aligning with common phishing tactics.

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://gimoguvi.ru/award?keyword=benim+hocam+video+ders+notlar%25C4%25B1+2020+pdf+matematik PDF link annotation
    • http://reduslim-italy.site/507064249079464q.pdfIn PDF document text
    • http://muzoc.xyz/zone_of_proximal_development_definition_and_exampledqasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412757/normal_5fe530ce6bf87.pdfIn PDF document text
    • http://salonhq.xyz/ge_healthcare_hr_phone_number9t41t.pdfIn PDF document text
    • http://usacreditscore.info/11236994305upxbs.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/naduj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_6019f906685b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485573/normal_6042cf365c569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabepujun.epizy.com/addition_subtraction_to_10_worksheets.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/public_relations_degree_online_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0492616e-7fa2-418c-a8e2-d7f5d5e5e4e8/miniature_dachshund_puppies_average_price.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/minecraft_windows_10_latest_version_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e71de9dc-5984-4eb4-842a-c9bbd3a667a0/13790444431.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/10774098761.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/27183862744.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/44933609562.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/abhinetri_2_full_movie_free.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_off0000c33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33D 5872 bytes
SHA-256: 3956554111066def339de7028c3faa4b23e8afcd96ab916a090b37861d40e049
font_01_sfnt_off0000d71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71D 11884 bytes
SHA-256: 8beafd546752cfa28a4ec3b767da6d9c34d58ee0a86ec564443fe0e8bf05871f

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