Malicious PDF — malware analysis report

Static analysis result for SHA-256 a265fecfa2d140e0…

MALICIOUS

PDF

89.5 KB Created: 2021-03-18 04:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: acdefc1d64092646959e6df88ccf3168 SHA-1: 9067b939625155aaa58fd7381250ef3d83fec04f SHA-256: a265fecfa2d140e0b232c8310cc09e99943ef3f68d389429da5e0cd090c61512
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 0.9997

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://jottigo.ru/strik?utm_term=which+of+the+following+is+a+topic+studied+in+macroeconomics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382643/normal_5ff689d52fa6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369794/normal_5ffed0f13b890.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417208/normal_600861573b65f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383340/normal_5fec20ee970d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_6052ac4a785a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_601c5f7bd29a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402280/normal_5fc767357ec6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379054/normal_5ff137b746451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fdf2e3ea45be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470387/normal_5fda91d4ac175.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/2b66a8fa-9f71-4d91-8620-a3cfa9e11551/rivupuzifewuxarale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6684d44a-c8d8-482d-8d17-4d6a3d652f33/84827202951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/637837df-e4c0-4672-8ad0-dbfb877e4282/46249866749.pdfIn PDF document text
    • http://zepedijuva.epizy.com/android_android._support._design._widget._navigationview_library.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a31b77-8c0a-4b15-b44e-2724884c5fdd/25422399628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3423fc94-40d8-4e24-aa65-d83087191c9b/kill_team_core_manual_chomikuj.pdfIn PDF document text
    • http://nimozan.epizy.com/79520868269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88798ca0-7af8-4c3f-b589-eb807f29b2cf/jakod.pdfIn PDF document text
    • http://linexiziretewoj.rf.gd/lawn_service_logo_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c6263b-ccdb-4386-b913-a9562a188977/kafagotipitikasuke.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_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 5556 bytes
SHA-256: 7bb2a17e49678c8591a44b07bc8c084878f306fe7df9d933019b4e3a49190bda
font_01_sfnt_off00012522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12522 10756 bytes
SHA-256: a07abc00b23521186ab3cdca8664759ac35739e6a97d4770ae1ec9d171eae0f0
font_02_sfnt_off000149ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149EF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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