Malicious PDF — malware analysis report

Static analysis result for SHA-256 9feaa58ffcc37b28…

MALICIOUS

PDF

88.1 KB Created: 2021-07-07 16:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 84ebcc1ee999e70aac4aaf1615247633 SHA-1: 5dc7ea8c0bf5c34ddd66ce0cb9fbe802e0be46cd SHA-256: 9feaa58ffcc37b2820f66a573b66dee2d364973ac25e135098698c2d90fdebd1
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs point to various domains, many of which appear to be disposable hosting, further supporting a malicious distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://queure.ru/uplcv?utm_term=aa+mirror+apk+for+android+auto PDF link annotation
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/0a147d7da79b2d3c1a2e9c95decd33d3/fikabigeboxil.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/22226028610.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/25950990135.pdfIn PDF document text
    • http://microlana.com/ckfinder/userfiles/files/4373121131.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/45509536486.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080b1e734cff---munimusasixagi.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df20f9b145---37155105895.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image//files/xaxijapu.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/44786443486.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160d31ef84f375---54453635598.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/k5apnqake13iad9ngabpo25jvg/guzukadozi.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/8b3e35d0ce92864e2370f61bb61ec8e0/3883789721.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/lomijomarefaxoziv.pdfIn PDF document text
    • http://polkovnik.su/upload/file/nisixa.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/45350901720.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/nirolinozelamobowimi.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/osl0eag1490ejpcfg2c73g3tm7/juxakewivesezigorawam.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/bifexu.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68864bcb1c---40064289263.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/4578ee0fa02b7f56be1181b347ec06a4/rulez.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/6441ff0fbbb1b09e9068cd2c68328bd8/69138395562.pdfIn PDF document text
    • http://vodnik48.ru/content/file/59716676642.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/diwaga.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/9ced186e91ae10b3678cae561d764521/zosuzesotepasawaxo.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/mekites.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/naruvigozepurulal.pdfIn PDF document text
    • 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_off0000e80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80C 22660 bytes
SHA-256: 7b6109be3ff952078e4fe48a5dae99702ce64cbcd6b2d0df94c33745582cf846
font_01_sfnt_off000120e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E3 10484 bytes
SHA-256: 137b0b3da2ff9a33c0909acf0ea15a2f84af6b5e82a19eb698fdc23fe73e44c5
font_02_sfnt_off000138ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.