Malicious PDF — malware analysis report

Static analysis result for SHA-256 753dbb8f3ed5ba13…

MALICIOUS

PDF

79.0 KB Created: 2021-09-20 15:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 70e8e2b82ad67bad49bfc2fae17773e7 SHA-1: f031065be605b42a4ce0f45c2bae3a31738e2f21 SHA-256: 753dbb8f3ed5ba13477e942210ac9edc70ea90e7523747601116ab13f0fedb05
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous links pointing to compromised or disposable domains, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is a phishing or trojan delivery mechanism. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://inica.org/files/file///xegiditupusufejize.pdf In PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/kafalugesopumaxiwefoju.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/42314325073.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/zaxobexixevabivos.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/vomizomumugot.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/depamodexujumemoxasumi.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/mukezo.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/3962669219.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16140251f9bd28---laperuxakakulaxofivijaxe.pdfIn PDF document text
    • http://satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/relozagivibeve.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/sulapomofugojomixezixeb.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-6/20210906182204869075.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394eed84cae---tafotagomo.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161461ef5906dc---zalekovejus.pdfIn PDF document text
    • http://osayit.com/images/file/97242747673.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/27763446977.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210916_103853_101.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/snib6f6qkkqjdaocl9o8k601ou/46629252690.pdfIn PDF document text
    • https://twinscooking.nl/twins/userfiles/file/vodemasesubesina.pdfIn PDF document text
    • http://d-innovation.com/upload/files/83437552989.pdfIn PDF document text
    • https://totounited.com/contents/files/5462651045.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/gabanolelum.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d931a588d---pimudopobewu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=o+gomovies+malayalamPDF 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_off0000d1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C3 10352 bytes
SHA-256: 7377c1eb9097386a3cf73cd7ad886de3862db124f189785b2e7e762a0e922063
font_01_sfnt_off0000e93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001014c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014C 17660 bytes
SHA-256: f45d79cedfee128d42f10c60ed3f382be34f083b12042ec73402908a3b55d997

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