Malicious PDF — malware analysis report

Static analysis result for SHA-256 f470cb5e94ff5e09…

MALICIOUS

PDF

68.7 KB Created: 2021-09-30 17:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 30657515722940fc3ba039f29ae4efc7 SHA-1: 993e3a84b76f40119c2035c87e833f5c860a0f5b SHA-256: f470cb5e94ff5e0934c8a69832bb0ae4633d82fbf60d29d00076aaf9e310fe79
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary heuristic indicates a PDF link to an algorithmically-generated URL, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the links and the ClamAV detection strongly suggest this PDF is designed to redirect users to malicious content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://clinicaveterinariacittadivignola.com/userfiles/files/leneted.pdf In PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/97186792343.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/gabafojesijixexije.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/85411557855.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/14323748235.pdfIn PDF document text
    • https://synersys.fr/contenu/file/xamip.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/p3l8877cr322ogg895p1dlsnt0/45937448540.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/74119634263.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/33079959674.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/loworakofupazekuzotape.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/befogowinitabogus.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/37993145674.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/6b18d3e50a88bcdbdeb34a3af193eaee/38111192817.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614aea1578aba---65162020572.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/pafatozuvidiw.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614638e04b916---rawoxoriwojuronagine.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/tetokimajuvinififemapeba.pdfIn PDF document text
    • http://ardennes.proximeo.com/ckfinder/userfiles/files/52766780132.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e1a3dbeb70---janesikijivobazisagije.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/33948004392.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/gomaketubobibowosuvironu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=android+full+appPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/39340585199.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DA 10172 bytes
SHA-256: 3e8c27c21565446e14a42da68920a2913b46ff261ead77d7780640742666c3db
font_02_sfnt_off0000e0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A0 14656 bytes
SHA-256: bab8d9a7ddd52d0dcc77785d98d5f469cdd88d34159445f6d1fd0da559a4d287

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