Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c22e4bbb26fd6b…

MALICIOUS

PDF

85.0 KB Created: 2021-09-13 12:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b5ea320170a758adf66823b665d71fed SHA-1: 6cc8cdfaedf7103166179bb213e3774b6c1e2b32 SHA-256: 17c22e4bbb26fd6b6abb2c1887c336d4f1dde26c2603b5f0cb62df96027e67ac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains JavaScript actions and functions as a link farm. Several URLs are present, some hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of JavaScript indicates a potential for further malicious execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://360global.ca/userfiles/file/7410019905.pdf In PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/pegofimegopedobunavibo.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0a7c3aeb1---80671764050.pdfIn PDF document text
    • https://zzwgjx.com/d/files/tonidimavinoxedi.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/42162330701.pdfIn PDF document text
    • https://phunhai.net/upload/files/42682066329.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebdd416281---54063401061.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/rezemobetukadisowivife.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/23218872464.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/6746595082.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/vuzopiledibe.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/61810711347.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eef6f84d0e---juxuwusipopatikimunufu.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/91314988403.pdfIn PDF document text
    • http://888chji.com/userfiles/files/8462076109.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/87359496737.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/65878377023.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/jemejugetetevivufadudubek.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/rurukupomorolirijajazabi.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161300c6fcea78---61121524897.pdfIn PDF document text
    • http://teresachild.com/upload/files/gakebiluwanel.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/nufavotezokizikexo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=clean+up+phone+storagePDF 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_off0000e6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BF 10568 bytes
SHA-256: e7490cf0a46744d4e0b301b46b629e5af04bc08435138533c109de77d0ab6bb0
font_01_sfnt_off0000fedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EF 18464 bytes
SHA-256: be3afe94cb9f29fc21edb9166908e65593361cc3eba999f0559973acee2e73dd