Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d877b3382775096…

MALICIOUS

PDF

77.3 KB Created: 2021-07-16 12:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 5f611894117bef0b119f0ff2a211ad15 SHA-1: a0bc054f38d9148333021221b7d49c4a87b360fc SHA-256: 1d877b3382775096bd0dc3471a063169ea2d4f8140053a16a5b0c08c6084b606
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm with numerous unknown URLs, suggesting it's designed to redirect users to potentially malicious sites for phishing or malware delivery. The presence of compromised CMS upload links further supports this malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://abe-rdc.com/userfiles/file/72065979443.pdf In PDF document text
    • https://hrmconsulting.biz/upload/files/daredepekujufulal.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/4988088868.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/v8qa44ve2nq13egakhouovuhrd/nakuboxikutididakezarexo.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f086147c15---mepodagolixojurapop.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/k76nhchc1vq7osvs4uuuutdhsp/65557315060.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/bivelijulifipero.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/kusofabefiredoziwosekuvo.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/38893184568.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/76036dd1a2bbcb77d5e93e8219f4ddcc/61496095384.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/60e9b94386c083062599ff1768a63837/mumeji.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/kobotidivijowuvuzuxe.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/5910060810.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7bba1973f---79466908778.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/sinaxenalatifikabofor.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160905acfbbb8c---67630660034.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/dafinatosuxanewuruwoko.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/42394323309.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085041b93037---rusajamubefelurubovorafi.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160be8ceb2e6d9---bijonux.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/38736710687.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/wogalalegas.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/17a5dc16961559e88f2c823edb870050/92310929416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=maternal+and+paternal+differencePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF2 16704 bytes
SHA-256: 9267e48e4a5943b1780aa4821c4438fc485cc35537322b271f1844c4487199a6
font_01_sfnt_off0000f86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86D 10320 bytes
SHA-256: 606e124b0f41dd6c2117ab4ec7e06e3308ceeceda3c38105e705eb8dc4702e66
font_02_sfnt_off00010fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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