Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03bd029a1013ab2…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 15:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 063310ad5cc5c48530b355561a917d5d SHA-1: a7be3a8310bf8aca258af30f4ea5a630cf144e0d SHA-256: e03bd029a1013ab2bbc3595227a43a04e3f28082a5629f7e8c5ae6a9ac293481
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The document contains a link farm hosted on compromised WordPress sites, directing users to download files. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613c7f0c27504---31852198723.pdf In PDF document text
    • http://baohanhranghm.com/upload/img/files/79490144810.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/1948670150.pdfIn PDF document text
    • https://nurea.se/currency/userfiles/file/fejudolemitatuzedu.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/50382660294.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/xosapiwafinelomeluwaxow.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/pamupawepikaf.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/77794376051.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/pujolekifexu.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/nr47un5988005063057vgeqr85/29010964944.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/39210097627.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/dagajimimotosizejuxuvina.pdfIn PDF document text
    • http://goopenapp.com/uploads/files/pebuganunenorudokuwanut.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/nudibinegubelupaxagufuzim.pdfIn PDF document text
    • https://aashianarealty.com/file/wesuxedesogagonax.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/bebifexipawomuk.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/17057815686130a3e5f1de4.pdfIn PDF document text
    • http://lulanjina.net/upload/files/jiwiduzojejugowaxevusuji.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/54728677722.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16138ee70e9350---89363509072.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/0a98d14af6bae65b55980897524efd39/tupotefibopukowezasimala.pdfIn PDF document text
    • https://robindayne.com/ckfinder/userfiles/files/livapotisifikil.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/nelapupakuti.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/93268249544.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb12b4420d---25473255398.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/2197379962.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=download+stop+motion+studio+pro+apkPDF 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_off0000dad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD6 10700 bytes
SHA-256: 7cca59465ae6603c3a476c98ea4081425a2f58142514049210c4d1170afb3b4e
font_01_sfnt_off0000f360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF360 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B72 18260 bytes
SHA-256: 4d12e179056b1d2263597e02b840911d49ee6f49524611e48f36d1ebc3790fce