Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9b8960232fdbda…

MALICIOUS

PDF

86.4 KB Created: 2021-02-19 13:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1a8908fb79070bc062d5301091342991 SHA-1: 402a10f056eb49c77615d43701d1c0902da83e2d SHA-256: da9b8960232fdbda8b7efeaf00b1c96be7221c059d5b91a15fad003765a75aff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=beneficial+mortgage+company+of+georgia PDF link annotation
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/domomo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5fcf158c4f7f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_6028aa28652b4.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/5f3efb7.pdfIn PDF document text
    • https://monemoret.weebly.com/uploads/1/3/4/6/134667898/5ecff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465252/normal_6017628c45c19.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/pakaze_turakefumoge_soxozawewunepaw.pdfIn PDF document text
    • https://kabulemumolitu.weebly.com/uploads/1/3/4/8/134869515/rizizidepuxun.pdfIn PDF document text
    • https://jeputuzomum.weebly.com/uploads/1/3/1/3/131398597/zobapokuwifiziva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480753/normal_5fe937c6167d1.pdfIn PDF document text
    • https://kefuvavubuxega.weebly.com/uploads/1/3/1/1/131164002/1069138.pdfIn PDF document text
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/faguxigame_gunoruduji_fazodifafigu.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/ribowexulo/watch_instagram_story_anonymously_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/driving_school_2017_3._5_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/chhattisgarhi_comedy_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/sawufikifa.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/c._g_video_song_mp4.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_off00010d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D31 5308 bytes
SHA-256: 5134434493e061200f96c07cc70956a3a2fe3101df99c9176037efef959b8cbe
font_01_sfnt_off00011f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3A 14232 bytes
SHA-256: d2f926a8352bd161c03bc6c6d978ced21af3658d88960a8461768479166a579b

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