Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec9f2dd23d0053d…

MALICIOUS

PDF

92.7 KB Created: 2021-03-27 11:17:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ded9e06212f7d6becee5fa7d43fdb88e SHA-1: d60c978489708b292dab65d4a29682a3fef319c2 SHA-256: 2ec9f2dd23d0053daea14a5f3ca8ef65fc3aefa75e35d7eae514267f22770adb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm for SEO purposes. The primary malicious URL, https://pelibifir.ru/strik?utm_term=pokemon+sword+and+shield+starter+leaks+reddit, suggests a lure to potentially malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=pokemon+sword+and+shield+starter+leaks+reddit
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/guwin.pdf
    • http://fadomofikupiviv.iblogger.org/2d_seismic_survey_design.pdf
    • https://cdn.sqhk.co/xubulozirod/cSgeVZ2/13473726035.pdf
    • https://cdn.sqhk.co/gixobujikelu/Ufpsgfc/pukegomakaz.pdf
    • http://zenifotekani.iblogger.org/42362710316.pdf
    • https://mutudibekakifu.weebly.com/uploads/1/3/1/3/131398274/popuzonulug_kokepesove_sujekujomawadu.pdf
    • https://muvisodujop.weebly.com/uploads/1/3/4/3/134358588/7b895d291.pdf
    • http://pavajevubuj.iblogger.org/1027345447.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_4943ff14d4334589b192b96c9beaf25a.pdf?index=true
    • https://s3.amazonaws.com/tofizo/75429275599.pdf
    • https://s3.amazonaws.com/dorobukasawituw/que_significa_adviento_para_los_catolicos.pdf
    • https://s3.amazonaws.com/zazelujeju/soccer_training_plan.pdf
    • http://witoluteg.epizy.com/multiplication_worksheets_4_grade.pdf
    • https://f9c380c0-3c9a-404e-8c76-a924832b335c.filesusr.com/ugd/9c8fb9_0a6cd87384764b2abb1a862ea925b70c.pdf?index=true
    • https://s3.amazonaws.com/sosupejuxofedo/67973209880.pdf
    • https://s3.amazonaws.com/dovulavavo/envision_energy_international_limited_annual_report.pdf
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_94a080febc374ff18650c3fd335063ad.pdf?index=true
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_6b3b6caec84349a084b5a5aa93ab283a.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012cd5.bin
09c391db5a15cd50c8766baf1493bec21165aa351220351c85c5d662ee45b92b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD5 5220 bytes
font_01_sfnt_off00013e7b.bin
eedb0faae492cf694d733d68caed2eba7f182604aa49ff7c395a317301e88c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7B 11612 bytes

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