Malicious PDF — malware analysis report

Static analysis result for SHA-256 1290fdbbfead3b3c…

MALICIOUS

PDF

79.2 KB Created: 2021-03-03 17:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ab996787c84848e6b72ec8b35d9b4e9c SHA-1: d57be007c593037770872e2bfb43240693bb7872 SHA-256: 1290fdbbfead3b3caf841c3f6877d5b48d3101c55fa8c0707a50ea40ef5843d2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, suggests a lure related to interview questions.

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://druttle.ru/strik?utm_term=python+interview+questions+and+answers+mcq PDF link annotation
    • http://twirlini.com/atlantis_terraform_workspacezxk4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489028/normal_6023ce83a3d92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488314/normal_6015e1f2c5b05.pdfIn PDF document text
    • http://giocodigital.space/maytag_centennial_commercial_technology_washer_manualwcz6i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_602c4f0ef2e0a.pdfIn PDF document text
    • https://lirikilufowu.weebly.com/uploads/1/3/1/0/131070293/3a93ab5b3e07e8.pdfIn PDF document text
    • https://nakotugobal.weebly.com/uploads/1/3/5/3/135300729/pafemolarojove.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485580/normal_5fcb2e94b88cc.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://s3.amazonaws.com/dovulavavo/18035743525.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/lafes.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/missguided_returns_asda.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_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 5412 bytes
SHA-256: 25123f69b54addbff15dccd5a4050130c9269085fea7b5a38b4ee9a0e257fe1c
font_01_sfnt_off0000fed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED8 10284 bytes
SHA-256: fd8614a9872e8ca226276a8bf4b5e58d6f4286ad681dd43b1bcbf3229a1378bc
font_02_sfnt_off000121d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34