Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa59391b603f9e6d…

MALICIOUS

PDF

70.4 KB Created: 2021-02-25 19:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6095923351345cafdd466cf655663ca8 SHA-1: 4e351a3764d74be25ea0343661f934b1f357fc4d SHA-256: aa59391b603f9e6dd0e27d205ce11c206b83ba6007e53ef81bb5a3fe0db90829
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 redirect the user to a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to academic materials, aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=a-level+biology+question+paper+paper+2+june+2017 PDF link annotation
    • http://firstflirts.site/luxuwumevodew4zyg2.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/79702610849.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450034/normal_5ffb84921fd49.pdfIn PDF document text
    • http://carinsusa.info/fatofixusitajisanewuvojpfidu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_60076f53e1efe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_600b441150d8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456135/normal_5feed73560fa6.pdfIn PDF document text
    • http://pocki.top/asfa_guidelines_for_therapeutic_apheresis_2016525uy.pdfIn PDF document text
    • http://salet.store/circuit_training_timer_app_androidkss6z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5ff69537a9a26.pdfIn PDF document text
    • http://ewwe.space/63120915087rump2.pdfIn PDF document text
    • http://baykamif.space/nakujuninadeliponopadataqe327.pdfIn PDF document text
    • http://thechambre.xyz/dell_inspiron_3847_maximum_memoryh98bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_602ed164ac994.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459163/normal_5fde835228605.pdfIn PDF document text
    • http://axecheat9.xyz/vieta_jumping_examplesv25s8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486778/normal_5fd19d978bdc4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/karcher_3.99_pressure_washer_problems.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/kapanutib.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/walgreens_automatic_wrist_blood_pressure_monitor_reviews.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_off0000d2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AC 5920 bytes
SHA-256: a3c48a6edfd237dfccec919c014278eb8ce5df5eea6f71aa96fea19eb04f7c7b
font_01_sfnt_off0000e702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE702 10872 bytes
SHA-256: e83d5469a6fcfdfa061949e7aac8357dafe73b90571033098e785251dbc9ccfb

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