Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23e2d14eda1876b…

MALICIOUS

PDF

67.1 KB Created: 2021-02-16 01:46:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 72f762a802b02ad1fcb389f5508369ac SHA-1: 06cb7609cd92a93ab52091c9d0dc2c43b2b16e93 SHA-256: d23e2d14eda1876b4936ce36c0614f8525f069a4e834da49ead94060e5cba8c8
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL leading to a suspicious domain that appears to be a link farm for movie downloads. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of these links suggests an attempt to redirect the user to a malicious site, likely for downloading a second-stage payload or phishing for credentials.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=the+chronicles+of+narnia+prince+caspian+2008+full+movie+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480598/normal_600c197ac8f21.pdfIn PDF document text
    • https://zabuxowinuj.weebly.com/uploads/1/3/4/8/134874463/kabubuzuzubot.pdfIn PDF document text
    • http://toppiksnack.xyz/30515211047jgqwz.pdfIn PDF document text
    • https://lojamagimom.weebly.com/uploads/1/3/0/9/130969840/molajezekir_dugiwiso_teledatuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fcdc19d3285f.pdfIn PDF document text
    • https://seporarutigofu.weebly.com/uploads/1/3/2/7/132741198/30966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_601b917bb16fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386609/normal_5fec91c5e693e.pdfIn PDF document text
    • https://poginatiru.weebly.com/uploads/1/3/0/8/130874277/0b0f9623becdd93.pdfIn PDF document text
    • https://zaridonuxubotu.weebly.com/uploads/1/3/0/7/130775126/refulesiramegame.pdfIn PDF document text
    • https://seremojalunukeb.weebly.com/uploads/1/3/5/3/135393353/kapezogi.pdfIn PDF document text
    • http://brumbum3.xyz/trip_to_bhangarh_movie_songo0i28.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/megelugik/jejusejusitogotalibu.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/92318149979.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/fewos.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_off0000c6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B6 5732 bytes
SHA-256: 0b9c803145db823c978bf27357ee4d409b195818e40351ce4f65e6eeddb166aa
font_01_sfnt_off0000da0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0D 10904 bytes
SHA-256: a98df0b55c1f8154109fc1bb8e9caeaafb9629c7940a4070e9e60ae483202d54

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