Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a065afedd4f38d…

MALICIOUS

PDF

94.7 KB Created: 2021-06-30 08:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1bf8dc592efd328c625ee19a7503a566 SHA-1: 5c576b136cbc1e4de65a9a92cf246873c7ef9bee SHA-256: 99a065afedd4f38df856e0477161f39df2d08f2a8da31cac697d807515f80c3d
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised CMS upload directories, suggesting a lure to download a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and heuristics suggest a phishing or malware delivery attempt, likely involving a password-protected file to bypass initial security checks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://aftaplan.com/works/peepsparty/html/upload_files/file/66255651816.pdf In PDF document text
    • https://arredamentigiacobbe.it/file/wijudutewufagad.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/57272047739.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/segezakoduburuko.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f0450076c---36039296257.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/50521578979.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/kn1clp4mk747g6joltsk07uhi7/wuroxuxapizepiz.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/tebutegovojegavolimu.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e75ecef7a---4196614324.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/xeratagobivatomap.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/83647407958.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/t6i5de9c9rosd48v34pmnb42f5/lapupewiwi.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/vdlt7fk22sg5dpvgkp58uo6fqt/7034624580.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816bafa30c4---14710877370.pdfIn PDF document text
    • https://dm288.rs/slicice/file/33426032289.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608db02ba8ab9---64696790108.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6253635313---xijog.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/b46e810fa6c93f015a11918042c83f02/fizedoxuzaxefaporunipezu.pdfIn PDF document text
    • http://www.moyekolodin.com/files/pekatawo.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/58124920500.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/12614045155.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/om699d8r81rr06si3ttvntu413/dinikivegujesasuz.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/10115297767.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=happy+birthday+in+harry+potter+fontPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC0 17776 bytes
SHA-256: 17b8097538478351a58b883153d42f64e48f0123506748781ad224054e977c06
font_02_sfnt_off00013dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFD 10628 bytes
SHA-256: 74a3ecd9377e176d309b16011e3d8b7b6c749c3984f9c6750f00dec5066eadaa
font_03_sfnt_off000155f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F3 16084 bytes
SHA-256: c27fafdda185be2695e99106f22849c7304d1d4eff2202c3575f3979fbde09eb

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