Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a002b1b9849e490…

MALICIOUS

PDF

61.8 KB Created: 2020-12-16 21:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9cd448800b1782e12d6ec347a3e5773 SHA-1: d81a994ea214bd4101d0aaa94cc8341a3e7e9387 SHA-256: 1a002b1b9849e490e271a233760634aa394a870e4027e16e8948492d9f88c68e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Phishing.Trojan. The presence of numerous external links, including a link farm, suggests an attempt to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://trafftec.ru/strik?utm_term=krait+phantom+exploration+build
    • https://static.s123-cdn-static.com/uploads/4378379/normal_5fcb6d8842e7d.pdf
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/duvijodetan.pdf
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f8a539c3ad29.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc77bcefc603311fbfa95b0/t/5fc97c7d9bc93d20d9a3245a/1607040125436/bhop_cs_go_command.pdf
    • https://s3.amazonaws.com/mokuwanibof/sonutigutikoxeduzaj.pdf
    • https://s3.amazonaws.com/vawoginele/imperfect_form_of_cerrar_in_spanish.pdf
    • https://s3.amazonaws.com/rorives/telugu_christian_songs_free_websites.pdf
    • https://static1.squarespace.com/static/5fc0e4a011f6a41984859e8d/t/5fcaa35c872fef1847c79a18/1607115612387/rally_racer_dirt_mod_apk_latest_version.pdf
    • https://s3.amazonaws.com/buwosevax/blank_cipher_wheel_template.pdf
    • 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_off0000b4ee.bin
998de37ad9c29ca43e606a64aa43a22a36ba99b4bf92fd0adff7026bb89f6bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EE 5196 bytes
font_01_sfnt_off0000c66d.bin
40114fe9776de513598fdf682655829cbcd3bb48c488c2b1c8f7dad8e95ab877		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC66D 10600 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.