Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb7ed92678f9e77…

MALICIOUS

PDF

80.0 KB Created: 2021-08-18 18:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 957a029c01de56066a2f49b6ad575e50 SHA-1: 44ab7afba4fb3d79ebefd2716bbe89a997e61a67 SHA-256: abb7ed92678f9e779c4e56c48277578ca71235b47858d65d96a1ff25b019d9e5
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and presents a link farm pointing to compromised and disposable hosting sites, likely to deliver a second-stage payload or phish for credentials. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/84867624455.pdf In PDF document text
    • http://dspec-car.com/js/upload/files/verewosasunuwove.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/550af108774f877c908190fc7d04acd5/jotuwavama.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/vomoj.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/147e302b168c9366c8bf2bbb604f1596/82184857417.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/11807964041.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/360d13d80a80f8838a8137782325360b/wovexub.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/b0575d9b4be20f1f1b2d2a2effe95cb6/97309635679.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/f912d58e6b2afd1252bf9a2c802a8944/76123091091.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/kazijumizi.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/53068230584.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/fefosalelixidume.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/riboliveka.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/dolez.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user///file/_0614974001624541464.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/wijikuv.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c23jphabmtfil7tmmuagmi6go/59589348310.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/84827876799.pdfIn PDF document text
    • http://willismctyeire.com/clients/c/cd/cd1fd5262213d36872a77bd42df049b7/File/bumivijetizawebewa.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/d30b0a45c1571a2a2265d6e67cc850fe/nogogiz.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b828648ef75---sekenomegavelu.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/45786643968.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/e51681eb79a9c82fcedc83c0f7ecb656/kenedipusapitisiloveviv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+the+best+router+to+buy+for+fiosPDF 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_off0000d5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 10508 bytes
SHA-256: 0be1315174c5abd31afb81d722f372c32359a0c5315bf7ca706eec1cf658a82f
font_02_sfnt_off00010606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10606 17236 bytes
SHA-256: b2243fdb91bef4336ad19ca9a356307316eb8cd3408db446ed8ac08e1faf5bde

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