Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d51cf90d157bea…

MALICIOUS

PDF

87.5 KB Created: 2020-11-21 06:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a7d59fca87cc593e715b7ff08d3dca2a SHA-1: dbeeee481988701fb0dc720225a843371ee79d76 SHA-256: a3d51cf90d157bea8bd0655617458038090c303d1631c6b809c0e7d92f689af3
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffset.ru/aws?utm_term=english+genitive+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5f9856ddd7ae3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446395/normal_5fa5419aac83d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476952/normal_5fb278d297a5d.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/remeranexe/pdf_annotation_macbook_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f75051-8a98-42b4-bac1-3123cba5d45c/filezuxasutolunade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad351d20-0266-4b98-a06a-ab87c83444ff/bexegubejonaba.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/common_chinese_surnames_word_search_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/iclr_2020_ddl.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/22817120399.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/zelda_ocarina_of_time_walkthrough_3ds.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/17437006869.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/formulas_de_caida_libre.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD4 4988 bytes
SHA-256: 6c32e871e5d0fc0155b73b5d34138b73fe0b1c377da5f0149b0b77ed03876393
font_01_sfnt_off000110b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B6 12544 bytes
SHA-256: 4dd03bfb8c58f34ab3ba2097586a1c82ab46e43ab44939a3c3b8b55c97868974
font_02_sfnt_off00013a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6A 16552 bytes
SHA-256: 915d9674b68ff62ac7336cb1e63004634e84e903cb16d078a424ad36fd823f1e