Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ecebfd3db6331f2…

MALICIOUS

PDF

84.7 KB Created: 2021-09-08 23:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f3473c940abf9b74e4d388c8b9cf6806 SHA-1: a4aaaf2c868b2d50e0ec43a0eb8b7e1da4410b7e SHA-256: 1ecebfd3db6331f27c34c4f7b03c5cd6abcedb2111951996da632f38d127a911
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to other PDF files, many hosted on disposable or potentially compromised domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a redirection mechanism to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://asiavent.com/UserFiles/file///11226112298.pdf In PDF document text
    • http://schokofontaenen.de/idata/34439367219.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/dodoxujidolaje.pdfIn PDF document text
    • http://chipgene.com/image/files/20210905_024725.pdfIn PDF document text
    • http://com123.vn/uploads/file/97743211701.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/xerexar.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210907_6C408A80A9661079.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/8431037731.pdfIn PDF document text
    • http://www.andreapondika.cz/file/79874568223.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/65131820025.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a12395678---15386060618.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/tozunotupejok.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312cbe97a6a---nabuguvuwatepunifaxofeze.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/mudizipikimemegibevozefab.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/dozixenogesup.pdfIn PDF document text
    • http://lyshiying.com/d/files/13260779026.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/jezogagavunula.pdfIn PDF document text
    • http://talleresjpg.es/img/file/golazazutixadozasonawim.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/setagipodesa.pdfIn PDF document text
    • http://goghepcacloai.com/media/ftp/file/fogekamurodono.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/56042545496.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161329a5d693fa---85329706278.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202109/1630699681.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090503033161.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/8483f486c19927e66f64bec053f940ea/88741603344.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/tijojojetijevilusugoluv.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/rutedotetodet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ozzy+man+reviews+olympicsPDF 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_off0000da6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6A 10788 bytes
SHA-256: f59b61502a0478304367a22ada9ec9f4b75f75954aa23d6262599564afc1afce
font_01_sfnt_off0000f358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF358 22028 bytes
SHA-256: 38b1df4bca22ee1492f26ca5c50dc6279e5a8c25f4ec400d0715ef813b436ddc
font_02_sfnt_off00012cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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