Malicious PDF — malware analysis report

Static analysis result for SHA-256 035173abb040fe67…

MALICIOUS

PDF

79.8 KB Created: 2021-09-06 07:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: be755b065bd66a7398af406d96db4ed3 SHA-1: 10546fc40ec2a9958c123f5dced3ca778b9cbec5 SHA-256: 035173abb040fe674507daa130967d2d695a5f05f470cb59f2f680b34fc6162c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing lure designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/be92a548aa1ff0f71187f1c933eaf39f/wasadepataneluxateb.pdf In PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/gukojexavapa.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16109b25661057---55931573379.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/rijuzazumisomadodonasul.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/70183816392.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/87782722498.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/tujufitaj.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/17260568458.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd970adedd7---96638613646.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f673d446a93---tibawetagif.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/2021825056565400.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/97338840017.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/09501dde905f8627c89a1d8db705c42d/dexadezovasumodifokaveno.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/e9718c8742d60c308d0db119244db648/34678294769.pdfIn PDF document text
    • https://ocw.tw/uploads/files/34838322111.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210808000002_0m5jgt.pdfIn PDF document text
    • http://geodez.com/pliki/file/xobagulibabafojolakofu.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c5086224cd1---pezipupo.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/26286081677.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/87ce8826fabeb6dd0895823be484d322/21934894652.pdfIn PDF document text
    • https://chp-travel.ir/data/file/95135534646.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a651a6c7d08---pejuzafuju.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611b4d3f30a34---95826879496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=latin+square+design+in+statistics+pdfPDF 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_off0000d376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD376 10832 bytes
SHA-256: 8b49b6401387372592f2aa4cde797af2b912d85bf36fae90e52317c56f4cb63c
font_01_sfnt_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 17380 bytes
SHA-256: 087f0c4459c48998977875023355fc8c34ffe9d7fd5ada9ee8d32e40388c9e35
font_02_sfnt_off000119d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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