Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4f9d8fe9c0ac5d…

MALICIOUS

PDF

78.0 KB Created: 2021-03-28 13:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5234dfab41adde88ef24ed0e68c2d4d5 SHA-1: 27c3ad64b8a0c56d2d5eb386acf3be6f5bd8e2c2 SHA-256: 4c4f9d8fe9c0ac5d2c25896637bd43999ec1a74a9af321a23b1abb209456421e
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URL that leads to a phishing site, disguised as a parts manual. The PDF structure and embedded content suggest it's intended to trick users into visiting the malicious URL.

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://resalured.ru/wix?keyword=scotsman+ice+machine+parts+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466391/normal_60267cb0c8bd4.pdfIn PDF document text
    • http://max-lifting.store/why_eat_an_anti_inflammatory_dietzis6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478414/normal_5fce45f757917.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468551/normal_5feccb2ee18db.pdfIn PDF document text
    • http://iwhite.space/dirigifixjnrt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403959/normal_5ff4fd8e8e2aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0903781f-f9c1-4079-a0c9-4188a6746652/mabusetewidefaminot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b54f87e-c251-4999-bc02-a8714b60f495/what_foods_should_gerd_patients_avoid.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/numelimopufop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042e3e58-d783-419b-a839-f4dcbdffb3ae/51356288581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e977adc3-714c-48bc-8c6d-865f1955ce3a/37957123038.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/ziwekigabebagepolapu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/97167821486.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/70684809917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58804dcb-7017-4163-b9da-0637d51cad27/21338962299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a575e1-df03-4491-8fa3-20d3b5bfcef9/mtd_riding_mower_belt_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/dell_latitude_e6530_laptop_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/windows_media_player_12_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/8340589626.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_off0000f2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 5276 bytes
SHA-256: a8bcbd3158abda25e8a6a5d3105c9a82a264e97c2e458176b2c9185933e11ae3
font_01_sfnt_off000104c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C3 11240 bytes
SHA-256: 1b41f9e070099f91c9148fe8b7af789e10f3bdf7f5dbee422f4aad901feb3e3b

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