Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e1be9f1c65e06c…

MALICIOUS

PDF

174.2 KB Created: 2021-02-15 15:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cfbaa08476d0c23ad56e1ee43fd2c5f2 SHA-1: 8837344a6f42c48b45a7e757d373b9725dba0007 SHA-256: 20e1be9f1c65e06c83bd7cabd1fdf1d4d203226dd3c3f13c38e195afcfaa8fda
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for a specific topic, likely to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically flagging it as a phishing trojan. The presence of an external URI points to the download of a secondary payload or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/123?utm_term=noam+chomsky+theory+of+language PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488315/normal_5fc91c5121130.pdfIn PDF document text
    • https://sukonusumetuf.weebly.com/uploads/1/3/5/2/135294143/5f13dbb555326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5fd5f25e8d75b.pdfIn PDF document text
    • http://sallehq.xyz/85315429112oyte4.pdfIn PDF document text
    • http://itsnat.space/7617942037r30kg.pdfIn PDF document text
    • https://jemijibiwozigep.weebly.com/uploads/1/3/4/8/134855884/gesuwizefuma_sajemo_zemasej.pdfIn PDF document text
    • http://pressit.fun/how_to_prepare_spaghetti_squash_in_ovenvs9z3.pdfIn PDF document text
    • http://english-10.site/convert_excel_to_fillable_online_free1gvcq.pdfIn PDF document text
    • http://gramnews.xyz/3399534967p0cu6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5fe8eddac529c.pdfIn PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/7793404.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/jirujudomuroxos-votoxufax-jakanodevin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/cavernous_malformation_of_brain_mri.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/valvular_heart_disease_guidelines_2017_esc.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/ribafim.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/13765186573.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/80953292045.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_off00026b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B4D 5428 bytes
SHA-256: 3acf5f76b75d5cafb09f1a6eb25aefa9265e85f40c88c3a1ea7764a1e4ddb38a
font_01_sfnt_off00027dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27DAE 14964 bytes
SHA-256: c21efc27e814013e26aaa72fe4da34c36918e0a3f5fbb87b5ba8ae2ff5e2c1a4

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