Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e94696c6035023…

MALICIOUS

PDF

85.6 KB Created: 2021-06-28 12:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a4aba8f9f6ec2efaf8d78a50729d3cd3 SHA-1: ac67982f415f68ab1894dfbc66812e311a0ba994 SHA-256: e6e94696c6035023fc9e183f68d4bbf92923a846cfd9ef6a1b4a5387eeff7619
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous URLs that appear to be part of a link farm, with several pointing to compromised WordPress sites. The presence of these links suggests the document's primary purpose is to redirect users to potentially malicious or phishing-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://oniceh.ru/uplcv?utm_term=timer+on+photo+iphone PDF link annotation
    • http://sarlampa.ru/upload_picture/nipabakajufebivolivuxopaw.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5e00c5a89---fovogigebumixenipupev.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160784bab45628---pevuniku.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/nabaterumeka.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/9936064309.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/58n421ul7di78jiav6iermdhfh/fodofogebo.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/79268789054.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/jivisopefawigeli.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160719481335c0---webatudodepilevedosonur.pdfIn PDF document text
    • https://pasarantogelsatu.com/contents//files/36885600497.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091f1842d98d---34292851641.pdfIn PDF document text
    • http://nensi.si/upload/file/galojafoku.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cadb3ad9---lanomidoturatejudaxenija.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc6dc1d069---87450134051.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a936a395350---16094615061.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c53bb722e2c---denorijibisojugafo.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/7l2ruo58tesbat3gf2jg5r5n2o/12526591420.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/evshmskrhkaadnnlpu4jlas3r3/kemakewukigufat.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/lasotono.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/nh4alnf6bs9drn03dkfepekovt/xavufudemazatuxasegezopi.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a37011cb058---76501966639.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bac44ed97c0---98113700470.pdfIn PDF document text
    • http://ekotronic.eu/files/file/43560373177.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://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_off0000ec05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC05 10104 bytes
SHA-256: 094586ee9e68384cb29e1d03d5d03bca16a774a3945cb554e3298fed52d5e493
font_01_sfnt_off00010244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10244 18728 bytes
SHA-256: 9b4fe179f1a0dc2912506a78c697db70dbeb39bffb43dbe96e2b4eea85710d84
font_02_sfnt_off00013159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13159 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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