Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd37f5338e15cb95…

MALICIOUS

PDF

82.5 KB Created: 2021-05-20 01:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d6476c2b5727e12c63d991cc954cb2c4 SHA-1: 8d09d3b646c59c9a347817f5aa4f1dec98e21e74 SHA-256: fd37f5338e15cb95b2094396d4cff6bb0cd72af7f2ab36aa5a0aef41c186706f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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://jumiwimov.ru/strik?utm_term=dosage+beton+avec+sable+et+gravier+melange PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462066/normal_5fe7f78134346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_6018e6a1873f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/adbd99e3-2b08-467d-ac8e-999eb17a6f84/6308485603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a68ba93-b8b5-48e7-94a8-d3dc597d5735/86715691146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95706ac5-3f71-4ecf-9bdd-2f8ce921642f/buribijeter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e563f0-097d-45dc-94e7-ab1d2a3c8c33/56409515099.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/gathering_blue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f256c467-5929-40c6-8cf4-441381172b62/ley_de_salario_minimo_en_puerto_rico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c2e073-e7a7-4ab2-9b4f-8e2a3900ff7d/saridakebonekugow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c3b09eb-49af-4126-81e9-9f46842914db/how_do_you_clean_a_singer_heavy_duty_sewing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce735595-b54c-4a32-a7a9-524581fb0486/3497545717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4269c34a-ad03-4bc2-abac-2d8a87c17b30/71530155630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77225613-05e7-4c66-aa61-6238f25e9eb1/pubina.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/the_reader_audiobook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be9850f-c58e-49d3-aa06-5e6dfce6d795/how_do_plants_overcome_gravity.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 5104 bytes
SHA-256: 4ca8955170645922080e41864d62af45541f09b6ba8b8dc5575a9d6ecbb03227
font_01_sfnt_off00010325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10325 13084 bytes
SHA-256: 0732996bdda72d55cde963f88b111fe477460cade8f1815cf65716b10f5fd4bb
font_02_sfnt_off00012c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C71 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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