Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b2aaeae80f6bbf…

MALICIOUS

PDF

77.8 KB Created: 2021-06-12 22:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 347709d99a4e076050dc4bbd0969273d SHA-1: 0adfdf303c89fce9c38490392bf0021de8da591e SHA-256: a8b2aaeae80f6bbfe293edc53ba66e07606ff14b079800c9325e25b1d8db7df6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to 'Aligarh Muslim University form for class 9' and embeds an external URI pointing to a suspicious domain. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the nature of the lure strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=aligarh+muslim+university+form+for+class+9 PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4482882/normal_60affa8044fc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_6037a25f347f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403557/normal_5fe837a28aca6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xosezoranad.pbworks.com/f/60677264433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42eb20ec-c0d4-4dcd-b1b4-da57f73086a9/20549672639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91299d94-d222-4c19-9c85-c04eda1b2a7b/fokafexigudimuzasix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9550f350-4a33-46e7-b60e-8535114cf0a5/why_are_government_statistics_reliable.pdfIn PDF document text
    • http://lajaweridadi.pbworks.com/w/file/fetch/144706272/how_to_cut_compound_miter_joints.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644838b5-ac55-4220-8373-53180435157d/what_is_a_scientific_peer_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5fe7684-c22f-422b-99ab-568a61298f40/fatifaneri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c837bd-8ed3-4bcc-a55a-8b1bb9226f08/wordly_wise_book_6_lesson_8_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6875a957-6a78-42d6-ba00-ac0d1ad922b9/learning_to_die_in_the_anthropocene_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b378179-f1d9-42da-8dae-f1378bcc4609/vtech_ds6671-3_dect_6.0_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995671eb-8cd9-417c-9c15-d451f146b0fe/76366038411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56ff084-fe0a-4077-b275-8a8a8920db1e/acer_laptop_prices_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57850ee9-c675-40db-9bf1-e03f688b428e/49661924245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7eecc2-9d3e-4d16-8533-2a6b8faaa7a5/kozodekodanelexidarega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44208dcd-3cf0-4aa0-a3ca-9042cf58a3d5/sp_404_vs_sp_303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e71026-b65e-40bf-87ac-7110eec44948/what_is_2nd_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d580156c-335e-4d17-9c8f-61a76f094d08/27508053930.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_off0000f100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 5604 bytes
SHA-256: 5eae256207bf2748e7d0532eff865ca0471a95e781809b4f2d814e434b15f59a
font_01_sfnt_off000103f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F7 10624 bytes
SHA-256: 1ffd3872b60eb61915061954d7493429d899384132ec58a9e40d40560fdb2c47

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