Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa55ffa89e1ff66…

MALICIOUS

PDF

95.4 KB Created: 2021-07-27 09:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0029631beb9aca9ea7d4f69d384e6fb8 SHA-1: 0b7e1f9de484ea3f3855895432432a4e99437bb9 SHA-256: afa55ffa89e1ff66bc3db0210fe4caa585848acf5718a86a37d27c5225e487c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external PDFs hosted on compromised websites, identified by heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure suggests a link farm designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3184950dba---65750172503.pdf In PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d28a35240---70529989690.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/39563776560.pdfIn PDF document text
    • https://digireg.com/upload/kowapel.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071656800a56---7358278568.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/xolixovorirujer.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/88975496491.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/399000ffaf26fc08b731e34061352dcb/rumodajumugozu.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a15a28965---89571114876.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/bires.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/2211052199.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3321bb170b377e2720cffbb3bb672c31/66553206011.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/kifurub.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/4be574f1cec386698d5fc4a4652d67ea/52826715596.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/kfb55f1q37t4t3kmhnp229ienj/nodefasobotesefoku.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160dddbae410c7---notobubewejakepefimawoxo.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/nqgr5rogc4hrvhnlc0skm8rb5c/19409738911.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a234b147948---6642041911.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608dec55688d6---suzadoposibisenomurudid.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/33485676870.pdfIn PDF document text
    • http://vinmexindia.com/uploads/suwuwiteguzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=blank+white+t+shirt+design+templatePDF link annotation
    • https://www.alamy.com/licenses-and-pricing/?v=1In PDF document text
    • https://www.alamy.com/stock-photo-womenIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F0 15984 bytes
SHA-256: fb7e04919f008a2a25c6df07adc6de0414eda52831e8a88f4258f4edcd5461ec
font_01_sfnt_off0000ee6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10681 10952 bytes
SHA-256: 21d090f18eae8151a85eacfc9c057efb5505f8227eef89f46952f425c8855a3e
font_03_sfnt_off00011f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F85 28844 bytes
SHA-256: 467beaceca6e06574a915152d99a23459d30c12b408641c03e49d3afc7a97158

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