Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d62bf5faa96b820…

MALICIOUS

PDF

82.3 KB Created: 2021-08-26 12:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 63f836f546e19afd4d306d46314e3584 SHA-1: 4b3a5f909a9aa8fa2b546482c64c680b2272191e SHA-256: 8d62bf5faa96b8200fc32b5093df80392e80db0ccafb86100ecf08ae78d45e89
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary function appears to be acting as a link farm to redirect users to potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sjhrz.com/images/upload/File/wowem.pdf In PDF document text
    • http://carrozzeriardue.it/userfiles/files/85676798021.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609e05f8497e3---luzubefelewobuxenukagap.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16095c7c57c697---valunuzowiw.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96f15234f7---28842833121.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/a59e9c9497af87cbf66e6386f25c77b9/tumolulidivirarani.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e7a1fc515822a3f78cac15d114bb4042/47054524551.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/tariler.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/75949379202.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/8a14769f9db522656134779954daea40/56668447732.pdfIn PDF document text
    • https://vozilasavozacem.rs//files/61844313256.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607539fd3bd08---jamifuxotowedidosulezu.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/713bca491635ae1f0490f3d4c7559d33/kozenapigomiteludavekule.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202106151926365086.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/21956802531.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/4078a69828608ad7c570c700bd331d8f/59965757242.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/9616810915.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/jilerexogijumawabodoxuje.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/lofosame.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d579c755e---54930528987.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/poxom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+much+time+an+egg+take+to+boilPDF 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_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF500 10820 bytes
SHA-256: 15a4ec1f67d0cd3899fc14710aac7628bdaa2b4aeea2c1be7e2753cd8c5b0852
font_02_sfnt_off00010dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 17288 bytes
SHA-256: deaaa909d7ad51adda4c35679787849269a6c9ff813cff2832c54aec1363dd28

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