Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32ae82cd4b62275…

MALICIOUS

PDF

84.0 KB Created: 2021-09-08 08:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 930a0185fdec031d61970eace4976f5f SHA-1: 98a9a129c49a41c6b4b4369f7044b5a31295b4fd SHA-256: f32ae82cd4b62275d81d0382d98b6cc3dd5444d6969dc224d919ed70e17411ae
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://toptoptraining.ru/img/upload/file/31527870535.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f01e5df391---duviwebalijo.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/30248005546.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aab04216f1f---zefoputagitujevezalan.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/3118950934.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/49205983466.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/73360386716.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/bizumiwarejimak.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/91113777950.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/51177901579.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/xekebajozirenulu.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/it20klkak7gcou62u8s1pnghas/poparekiw.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/pofaka.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/50540713067.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337bffaf7ef---tokuzilexejomudiwami.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a3eedb557---jajofezuxoruf.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/28f7023483eb07bf30c6e6c42b96802a/xosixurejojanox.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210728055114.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/46125460278.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/1ea14aa598fd4989628d8cd5640c0f3b/junafubu.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/44184967220.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/2d192d08fd096f8f10807e2079054c9d/dijisojidusuva.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/0224cc47352dd5388b5d01069f3cb510/72297483678.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=make+it+work+book+pdfPDF 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_off0000e461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE461 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 10484 bytes
SHA-256: a7066370d66b4c998a34b3fff571581eb7e1fb9591883a54250cdc233b8489f8
font_02_sfnt_off00011448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11448 17880 bytes
SHA-256: f952ff5024b2170e4713c412e030d3d514ab0b16b39dc9037e7ae0dd4f8cd584

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