Malicious PDF — malware analysis report

Static analysis result for SHA-256 0419a7153b898ca9…

MALICIOUS

PDF

92.8 KB Created: 2021-08-08 07:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bc6302371eaee813078cc32898d415ad SHA-1: 1c71da594f9f3bdf8d831ae9789dfd969238319c SHA-256: 0419a7153b898ca944db7d0e4f0a961ed91dd53e4e588c3db0b6d630cd367ec2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://sushiloverca.com/uploads/files/pizojamovosudowusul.pdf In PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23851562248.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/a7pdtmtr4km2v9cjf5vku1oapl/dilofubukotagisezobidil.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/govonodele.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/vasuxonewujarovufuxa.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/30729231627.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/84873447685.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba904a43ba7---29836854920.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/goxiro.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/vuluwuzidetaf.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/rojijinapalaju.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/vepefuneladetakesamow.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d61920aa63---lujenoxojajefusub.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/cic5narnbdeqap5mk0oj9aopma/wixed.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052323151184.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/8f3c6f1d44c8643380350a49df300681/pupemape.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/e6d09372b85d3219ec9a60ccded0086b/72835699667.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/nazodirudiwotepumi.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c5de54f157e---68569578941.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/baworejogiluga.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/gatixunole.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/a1nh9tusbv5agjtco9freo5137/625674354.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/heebt80v1vvdoblfmupd94pe55/76239546291.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/397fb8ed8f03102932883831720a343a/pawozatugixabuw.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/18725696384.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/wibokusafed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=patient+progress+report+templatePDF 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_off000107bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BB 17708 bytes
SHA-256: 80d75e7cdf2520b306aad9dead2856d9a59e1145543417fde82b7c02a680e998
font_01_sfnt_off00013517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13517 10596 bytes
SHA-256: 2f263f535c08639706a60fcc56c892114e8a0a43b96a6dcff70602fbb3c1a98a
font_02_sfnt_off00014d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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