Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c09bd81a018895c…

MALICIOUS

PDF

69.6 KB Created: 2021-03-28 12:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02c9081bdc7b7d7e56ac965e37f40c2f SHA-1: 22689fe0aa9af63f4f3154d413936778f44f094f SHA-256: 3c09bd81a018895c2c93ef8958ed98a1860d5933ad5d2a9de9d72db1a6bf7032
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a URL that appears to be a lure for downloading an audiobook. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=the+organized+mind+audiobook+free+download
    • https://cdn.sqhk.co/zogobadakedu/TN1idja/woxepofipanosid.pdf
    • http://bcpzon4segurabetaviabcp.com/74949186681i8kv1.pdf
    • https://vegebawijinewer.weebly.com/uploads/1/3/2/7/132740558/9485c99ad84547.pdf
    • http://italywow.info/9979281580834ews.pdf
    • https://monowulesamewul.weebly.com/uploads/1/3/2/6/132682048/82827.pdf
    • https://cdn.sqhk.co/welosezu/hjde0E6/launchpad_fulton_login.pdf
    • http://letilemugemin.66ghz.com/92982282606.pdf
    • https://cdn.sqhk.co/woledowo/gjhfjbQ/kate_the_story_of_an_hour.pdf
    • http://sodalabs.pro/everstart_maxx_jump_starter_1200_reviews0ax5.pdf
    • https://venolebibu.weebly.com/uploads/1/3/5/3/135348563/e22e14e946a4e0a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lorifumofelu/1963907363.pdf
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_20fb09f1a5bf431c9fdb69bcc838326d.pdf?index=true
    • http://fuguduvuduwir.epizy.com/android_one_moto_x4_camera.pdf
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_51d32b0a570f4fdbab514508210e007c.pdf?index=true
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_1e52296c6c5343e1804dff49feaf0b53.pdf?index=true
    • http://jenabarove.epizy.com/radial_engine_drawings.pdf
    • http://xesujenomudot.epizy.com/12905857262.pdf
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_cc9a2691b5484e4e94240e3986fcfd0f.pdf?index=true
    • https://s3.amazonaws.com/polojuliragam/all_bollywood_movies_2016.pdf
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_f6dfe1d70a354d1c8e32d21d9878037f.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_off0000d26f.bin
902e9354f6627e66898af609a3c804233101fc3eaad87bdb5f51686a89c88163		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD26F 5440 bytes
font_01_sfnt_off0000e4e3.bin
7bfc1de6af691e112b59a1c6ab22fe284efe634421f0b48ae39ce3c8448ba26d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 10800 bytes

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