Malicious PDF — malware analysis report

Static analysis result for SHA-256 598856f3a6421cfd…

MALICIOUS

PDF

77.3 KB Created: 2020-12-11 19:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7ae6afb62ba797caf368b4067863c4b4 SHA-1: d2cd978e6ca2ac4be9e472b66ad8c86e8c20cdde SHA-256: 598856f3a6421cfd5ebd2daf0a1eee91b3c51fd8360a141dde67303985ace64f
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 0.9998

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://trafftec.ru/strik?utm_term=manual+valve+spring+compressor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473044/normal_5fbfd967b57dc.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/zoromexemuzid/dimivovibeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a258f5-a290-44d5-8e29-93ec34959815/10591415467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cbab770-1abb-4eaf-96ef-af36638e84e1/sidotipon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132a7a0d-a994-4389-8a3d-5dc8480d0bc7/tachibana_sans_circumstances_with.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/wavetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8375f3a8-d730-4684-a218-18fdae2f320d/mason_bees_vs_honey_bees.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e82bbd14ff0dd2b64c2c/t/5fc80c043002ac0ad809bbed/1606945797911/sound_meter_pro_apk_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105d86c9-9518-4618-b870-373cc1e5b4e2/turuk.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/ffxi_controller_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/jowiwe.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/fission_vs_fusion_sun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8e6d36-de46-43aa-bd98-03bc206afbf9/4961933738.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_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 5316 bytes
SHA-256: 6b7a962d2baef8f0813f88a356d6d4be83006c2537d9c7ab4401ef37e96b4535
font_01_sfnt_off000105c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 10216 bytes
SHA-256: 01897c8bab9a40cade8f26a2aa8e3a46ea195fc7dfd735eb25cbbe239f6b076c