Malicious PDF — malware analysis report

Static analysis result for SHA-256 290da41b382e57a1…

MALICIOUS

PDF

76.7 KB Created: 2021-04-02 19:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d3d77dd1d986d7ea722d7b7a79351b9f SHA-1: 21839bf2c63f5841199fe90648088bc2d5ef18cd SHA-256: 290da41b382e57a1588c3948f37b051003d3afbb7bdd89a9ccd25d4e7b967dc8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain commonly associated with phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=motorola+ht750+radio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491168/normal_601f3c0bbd82a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495691/normal_5fe129afe3adb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455207/normal_601dceb09dcd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478923/normal_5fe9ce14ee613.pdfIn PDF document text
    • https://cdn.sqhk.co/nijazulagoza/ghhjhDh/bizuvogixij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_602f398c20c42.pdfIn PDF document text
    • https://cdn.sqhk.co/senogewuki/09hggig/50214613599.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5ff92e2e1dc8a.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/N9ibCCc/vegatedexoribejukivedoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479445/normal_60184de92f132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467910/normal_6044f451a896c.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/ijgBibu/picsart_photo_studio_collage_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_603e8d61dbe53.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/fFiaC74/easy_smartphone_for_seniors_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/fjiQkij/30636518935.pdfIn PDF document text
    • https://cdn.sqhk.co/nerawotobiz/iUNoicp/vuloporikixabupuzo.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/regegozumekoza/ijazat_hai_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/29862469860.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/interpersonal_therapy_for_depression_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/85475778640.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_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 5088 bytes
SHA-256: 1beb067ebdedc1927590db1480b2cd971c5ad9916656e819405eea2dc6680210
font_01_sfnt_off0000ff60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 10676 bytes
SHA-256: 2b8ce8977eb3188af46df9e7ad83c34e44a0e92c629092ca4bda46ad44ff72a0

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