Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb5f326cf00d516…

MALICIOUS

PDF

75.6 KB Created: 2021-06-11 20:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b441bd031277c29c6c857c941305d91f SHA-1: a3197342d940a052b0f6a9c49fe1b3c341cf85de SHA-256: 5eb5f326cf00d516d838bb9346da8d625d39bbd545e9fb3aca814ab2ec2e75e4
156 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure, possibly related to media players, directing users to potentially malicious websites.

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://chcial.ru/uplcv?utm_term=mx+player+shadi+me+jarur+aana PDF link annotation
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/59d3546ffa414c0bb21012ca6f7551c6/41342228523.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/dq6f8m8k3h0apc0qdq5c8aag7u/29644260612.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a8d8806d290061a49aea12214bd83f62/dogimifozutivupajuwu.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/d97fe7beeacb74fe2bf3539320dde588/3841797625.pdfIn PDF document text
    • https://promise-land.com/upload/file/wemujifomagakedi.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760b71d1697---13868041828.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608185423155e---56045542987.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ad5ce61d9---wagapevinurida.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/49259232827.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bb7a7c091---94127661469.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/46110574073.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160838875021f1---mebokopabevawasakunaz.pdfIn PDF document text
    • http://fotossc.pl/_files/file/jusabonafi.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9df3b786a---jarurijaxejugumarewed.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/u43tmn9b7r0cvoak0i7nctb7tq/20660717015.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE966 5448 bytes
SHA-256: 77e5c502090942c06f412c46aebcf061cc03239d03230359a862755f96c404ab
font_01_sfnt_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 11164 bytes
SHA-256: 1e3042600161e970ce9a6e29af093ef10cbc95b0953fb12dfcf7415e06d4832b

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