Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa0cff91c01f6dc…

MALICIOUS

PDF

87.2 KB Created: 2021-06-22 10:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 513204c7b53c51e820a0de291b02daf9 SHA-1: d3fd0434159d0697c108da83e43bff41e52e1491 SHA-256: 1fa0cff91c01f6dcee6e44bade71d236f7956bab85e9de23875fedd099e93f49
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a link farm pointing to compromised WordPress sites, indicating an attempt to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for initiating the download or redirecting the user to the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae4d066f7d---pakesonefukarilitojegox.pdf In PDF document text
    • http://naturallabs.de/userfiles/file/pofixogefakivibagar.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/31966174562.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a353c2edf953ece7b25bffc7494b51d0/22645879924.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926c5172d69---zeborexugusanoge.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b82c7e1aff---72306392757.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608434ad1df97---5409844645.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707f037583c---49393448679.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607282d2d948f---sirojutamakofapawokemeler.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/118ad326d986ea441a1756ffc7bb7ac7/71103431281.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/4935e8c25c5442a46e992a2774f13686/lodematexejajemagunonebel.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/6991af466011b0227679d33cdb9956e7/nurogenujajupivag.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/a20d19f835ff94c52e6e577ebf353cda/labuworupanogojo.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/76396934354.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/36136426680.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/51550554836.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/3235922164.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/23094871448.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/gisikisurawixatibu.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=suhas+shirvalkar+samantar+book+pdf+downloadPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011bec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11BEC 17584 bytes
SHA-256: 67861ca5ec38dfc94db74d9c84ab1b9e08e1c7adc31c597e1d16bd90d61b45ce
font_00_sfnt_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 5740 bytes
SHA-256: 36277a86bcd921c66b7a2fe2d34cef0e30b2cfb764b23fa364133b6b6d19bb0b
font_01_sfnt_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 10752 bytes
SHA-256: 6db0822aaac5e0782dc64c3b171ff6285cb267b254670ffae275edd26f710b34

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