Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d0e03a1262d15f…

MALICIOUS

PDF

104.9 KB Created: 2021-08-15 23:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 26e16d03d737bc251be9d95a4d48c3a2 SHA-1: 543f885a2f3fe5ad5783510cc740b6b15aed363e SHA-256: 62d0e03a1262d15f6d9cd830ecfa55922425f60da9ab0265a99bfe4f96395ea4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160aae025e186c---ditolegenixomidakojonimuw.pdf In PDF document text
    • http://www.allatpatikapecs.hu/images/file/71420735044.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/fee808ca79e508ce719ddc8abd2bfc67/zafumupatoz.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160effbf5d8301---zidaxijuga.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/5be9d8f24fce81cc2c3fb71d451da11c/gaxoduzemev.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/boxufiduleva.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/313ce069d3ba9a803205d51921890928/30970874009.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/wefakivobebilejaruk.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/1447067626.pdfIn PDF document text
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/4293570773.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7101a674e3---tijerupugubit.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021051819435266.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/39edbs1hhi23mueg5kand2f8r3/forinolexevukixa.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/xupibanipizetodevopin.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/dajinutajaxup.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119326c6426b---2880997085.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16277699256571.pdfIn PDF document text
    • https://ikima.fr/uploads/file/teposimezepef.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8ibuols5q8dh96cl5f7ipuh2b9/domomogejuvubefofajij.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610762327c049---18680878791.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/7m6nmf28qbkcecsjc5526pe15t/9613354731.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/5uimkiqgs9r5mhlnkh9n19t0dj/pomibujovo.pdfIn PDF document text
    • http://jucal.es/images/file/79396377779.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/zujumen.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/rawagezapojoba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=reflexiones+de+la+vida+diaria+con+moraleja+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_off00013493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13493 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CA5 17888 bytes
SHA-256: 225e5fcf9381b1d6fc8b986d47c8bfbd2af0bcf4d22722d8d41b0cae5de91596
font_02_sfnt_off000179e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179E2 11024 bytes
SHA-256: 86abe34616686717e3f620e104057cb899032b087aacc1b93a518c16e48e8326