Malicious PDF — malware analysis report

Static analysis result for SHA-256 480e8a82da0b32f4…

MALICIOUS

PDF

134.5 KB Created: 2021-06-30 06:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 52463b39fe16343b3ad401899395d276 SHA-1: 72373baa4ccb61f1b696b34c03be0cde97aeb634 SHA-256: 480e8a82da0b32f4cfa2b46409508a666cd704342f0543551eed7dd212e39914
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. These links are likely intended to lure users into downloading further malicious content or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://ingpoggi.eu/userfiles/files/86470979844.pdf In PDF document text
    • https://xo-sound.ru/userfiles/file/22794222877.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/431d5a8cf6fe54b7cb102373da78f3b1/botezatinupatixapuguget.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/kozulepofivaxiripi.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/45q55udddr35mnmkr65set2ol4/lunuvejix.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1b44466a7---23684807590.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/fd3f99cc1351cde16113c54482a5931d/minudadepegu.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/2963a76a51fe85435323fddbf755ed15/97251796648.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/63401436021.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/8afd7b768530a84db2e17f2b6de1851c/pisuloxafumeruminekuza.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d6fe90fc9---namanesonerowimo.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/0kvr8tgrvmnlnu4l3a8mqb2goq/8451572083.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/sutilazesuderumapisalude.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/e94b5992b6e449ed8c31d18e9fdf7eca/puzufekadupomevanoxobe.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b9340a4e7---70254263515.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/c6jn4jan2grf69nhck0jnvres9/guraxobitipemegide.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/11673282985.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/12267040263.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/d590fd5007dd83106aa3688686a78538/gojefuvituvotuwunir.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/31816474446.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/65885003397.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/22292216984.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3c8512be3---delotuzenijilivubosil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=encyclopedia+of+feminist+theoriesPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001aba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABA1 18216 bytes
SHA-256: febdb14f91236eaafed3d9f027feef49c393acaec1da5074ab21313a7861cd41
font_01_sfnt_off0001db05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001f31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F31C 10980 bytes
SHA-256: 350961525675fa0bf27abf0ba20f9710bf11b9f93a00dd35910700100c1c6ee3

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