Malicious PDF — malware analysis report

Static analysis result for SHA-256 024f1910d96c1c7c…

MALICIOUS

PDF

77.8 KB Created: 2021-06-11 06:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5c92ac71bf53ce2d1f399a4488c508e SHA-1: 2021f18efc9581e95b3cb0394f80edaef1f268ff SHA-256: 024f1910d96c1c7cf353ddd69563f7c0644fe8d5f57872e81acc2880cf953326
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, embedding numerous URLs that lead to other PDFs hosted on compromised websites. The embedded links, disguised with search terms like 'nonton film fast and furious hobbs and shaw', are designed to trick users into clicking them. The primary attack pattern involves directing users to a network of malicious sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://catamma.ru/uplcv?utm_term=nonton+film+fast+and+furious+hobbs+and+shaw
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/274f4219e068f4c83da9644cd327ff6f/58421272003.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf001da52c---75577496459.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160981c4f533ab---78165690172.pdf
    • http://ateliergermain.net/sites/default/files/file/gofamumolukila.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd61ddeada---zawus.pdf
    • https://its-bulgaria.bg/files/file/97633568485.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b18607a8070---tixosurubekuzizosom.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/if2lnua6o648lc85lqp40vejkn/repukazo.pdf
    • https://luminex.pl/upload/file/nifuxitojowag.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160795165a2f90---fabevabuposomi.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/1f37de3f4ba822890cff32ad9ac2db75/sujexufun.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b9a033bd3---22796961043.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/ua56jmjub8ovpv1tkhugbgep9j/xexoxinomogevugiwemuja.pdf
    • http://airsoft1.ro/files/file/34281264254.pdf
    • http://jjmcp.jp/userfiles/Image/file/20178151981.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/770ec961526e0e60348fad5e1acfbb99/fazikodari.pdf
    • http://zjpjxt.cn/upload/uploadfile/file/lavizi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d928.bin
445e7dbfe4a9ec7f5912fffa02720122126cda4578ce65ddc09db3bf7e5a0392		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 5348 bytes
font_01_sfnt_off0000eb40.bin
840af55ebae38da6c18c1003a48bb807fbb9730ca85c920879609f46633842d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB40 11952 bytes
font_02_sfnt_off00011320.bin
4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11320 16060 bytes

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