Malicious PDF — malware analysis report

Static analysis result for SHA-256 31dda2e37d27e5d4…

MALICIOUS

PDF

81.1 KB Created: 2021-03-14 15:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 931406570169f7d51ddd1aac6b6f2795 SHA-1: c473452e1fa65f22a5053f64a0cc5a1738d71c70 SHA-256: 31dda2e37d27e5d41a9d78058594f4a35d6b2c7457cb6cd3c2cc133dc6b7d5f8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique commonly used for SEO-based link farming and potentially phishing. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://lozipotod.ru/wix?keyword=root+zx+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404512/normal_5fdca81f11b47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_6019304fba663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_5fe7980c126ae.pdfIn PDF document text
    • https://kulegireketo.weebly.com/uploads/1/3/5/3/135325025/dixapigakerixu-gopirosopeziw-guvodunup-norelodepejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_603120145bdb0.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/zomokatak.pdfIn PDF document text
    • http://devedilazabu.medianewsonline.com/xubezofunugosiverixo.pdfIn PDF document text
    • http://gonalotuturopil.mywebcommunity.org/jiwoburizobufabajumaxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403406/normal_5fffbe10806a7.pdfIn PDF document text
    • http://memimusisat.getenjoyment.net/how_many_books_are_in_the_wimpy_kid_series.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382960/normal_5ff717c0e7013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5fcfa21ad47e2.pdfIn PDF document text
    • https://xobisopi.weebly.com/uploads/1/3/1/3/131379629/femuwukaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5fe252fa6da6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381997/normal_5ffd46684d93c.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/5e6fd2e335.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366973/normal_5ffd00ed8a981.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/sumesawoxajew/guides._gamepressure_shadow_of_mordor.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/desamuzusobuwiwaletinaf.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/car_parking_games_for_laptop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/mekewolarupenuli.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/dewabusakesetatitedawuku.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/mutupiteluxo.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_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 4400 bytes
SHA-256: c3e40a1fd7364b39e15c833cdf2c021d716a099ab847e2f89d59afd3a3792cc6
font_01_sfnt_off00010085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10085 12548 bytes
SHA-256: e4dd0ef48f007483e6853b7b582088717c89ac2d4133e667134f18a6dd1e4e13
font_02_sfnt_off0001291e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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