Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ecc69389569492…

MALICIOUS

PDF

78.2 KB Created: 2021-09-02 17:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 54734b23de75d5600b32a321309808f4 SHA-1: 07f2eb853d23588ea04223d473db75eb945619db SHA-256: 69ecc693895694920d87db1de3af95da8a7f25435c738d5348e1ad76b35cdbe0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and a link farm indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://yakutiaprime.ru/SITE/files/editor/file/jaxov.pdf In PDF document text
    • https://hogies.com/includes/template/uploads/file/41857410153.pdfIn PDF document text
    • https://aneri12.cz/res/file/devuzudodav.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/vesivazinafa.pdfIn PDF document text
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/93519083473.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e461d8bea80---nijoduzamifisufogux.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/50137491807.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tisasanejivaf.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d90de588d51---55724229407.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/68084151510.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/nenisidori.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/68060167243.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160926adfadc8e---56512497634.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a527103ce7---kiwatuwapobekefe.pdfIn PDF document text
    • http://cpils.com/userfiles/file/97769009643.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/54739654012.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990b0b43451---wawonizugunux.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/bitagiwunalajofokexakubet.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606eeecb57ace---gufemasivosigigejov.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/napuredi.pdfIn PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/6851441666.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/58130971307.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612703dc5e646---raserun.pdfIn PDF document text
    • http://apartament-krokus.pl/userfiles/file/putabawedi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=morphy+richards+combi+microwave+manualPDF 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_off0000cabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CE 17692 bytes
SHA-256: 2688f88626c9a350bc40f0243880627a452178a550fe234b735244580e9163ba
font_02_sfnt_off00011146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11146 11180 bytes
SHA-256: 890630f19e540b57379705b7af225e11fa1c7eda609302159518778b4647b3f5

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