Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94049eac71a7780…

MALICIOUS

PDF

101.1 KB Created: 2021-07-05 03:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 69887cfbff5d0be925e6901a0bc1a099 SHA-1: 0a0de35e0338f8cfa8db101989e5542fa48e0a50 SHA-256: d94049eac71a7780e3761f2f0263f3607d7b9c855cd78fed4c0808bc02fa815d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised WordPress installations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to obscure the true malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://irlanc.ru/uplcv?utm_term=testing+question+answers PDF link annotation
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/1f7e9b2b0c1e757a0e4a2a47602a1fd1/mikatexadabowiwuduvezukum.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/88721172586.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c46b7deeb---xefifotikarugovigazusi.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ccce62a2fec---pututufi.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608751e07b579---11299420172.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/daa17a58080e35249a6a08e39dacfa62/56230089173.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/gelozalejeviv.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66f8d54e9b---kimodikulujefepo.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/22772318765.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/xizesasumananezaxafotulug.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/sv893b1lsr7tf4phlhajf04rj3/bujutomivumu.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/7df247788fc4489430d4a80fa9f4f0a1/kosopobepekojotepifevaju.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/jubokafexukux.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/80233434459.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088b228bad84---56030165018.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/3cdd2591131582e373a88c7d135740d5/94859107929.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/95122596420.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607975eb84fed---gadomawexilajutejos.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16092830cc29c0---gulaw.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4ee2ad5c9b8a617bd332a564d3096a3c/lotuwizobu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jgjfc61nh72v1m44rsrnfgki95/nuruxajonawutik.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7ed53f03e---xibeguzutizuwozupalolu.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/2023bc2f51122247fa433d8e8487eae2/bejixuwiz.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/aac739635e5773d983448da2bab4c312/76156738591.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/1e699f97d4d8fe78cdb08052e611219a/rujidu.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_off0001286c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286C 10532 bytes
SHA-256: 65780445543c2c6cc4f53f602fcbb006960a12f470664ad13fd7ae8fc5cdf38c
font_01_sfnt_off00014057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14057 17944 bytes
SHA-256: 32b67791b92e475da40d7a4cf8541f1073f202875d80adcfb33e66bd5ad917f4
font_02_sfnt_off00016f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.