Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a8ba60918ecb18…

MALICIOUS

PDF

147.6 KB Created: 2021-06-26 05:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 919dce389813bff9a7e2489c28b4c3f8 SHA-1: 146c1a24acfcf73fb19545a293305779f1db5696 SHA-256: d2a8ba60918ecb1808f6d1f92c8809d306cbd098a4027ff437ea5893fa30a21f
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The heuristics indicate the file functions as a link farm, directing users to compromised WordPress uploads and disposable hosting domains, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8ad427196edcc5bec9becdb8e47615e3/67507985196.pdf In PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607d61314c50f---46355248481.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed004a53fd---norojewewugukisi.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/30893207108.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc07d48bbc---tamukopudokagabomotudatu.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/5d3e5e486f6023cd350fa24cecdb9b55/39091539232.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8b37d2f9a2641df411aecca3758c225b/daxuzawedalakaz.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b1069023d93---96686064350.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/70958214701.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/3bca2b77002ce784abd9b80f33a6c1b9/zolusogamo.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a456f447ee2---72061081509.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c155f923bb5---lavafogisuregetarodereg.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8b538c001ac141eb36fd5dba8887ca3d/90404322026.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/49408731818.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/579ac5824bb3578141da633c06d44eb2/wuvirozatifidazo.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608266c0ad8d9---wimamenafuxinebojelojipo.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/6m6bbj96egbjrc68rd4n1cs3c6/46150266911.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/ridoxojalelavalurabenusor.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/tg97pod9q1c41qfetamg8bac54/zusomiwenepemo.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c210b015859---38661420479.pdfIn PDF document text
    • https://actorconseil.com/files/file/41254786415.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/vn0naf31rcbjpss18fbf188id5/43645456974.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/natolitomu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ee4a2d3e9---sudutupusuligukududavuwot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=interpretation+of+results+meaningPDF 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_off0001e339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E339 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001fb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB4B 17196 bytes
SHA-256: b53d8d9107a8192799d04047c4ab8e0d81469a368648d04ff518232a845ca88c
font_02_sfnt_off00022839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22839 10752 bytes
SHA-256: a168c76c741f95fce6ee0a0f8a66a25e6a952203d7e0440ce2a3d7f10d07a66b

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