Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d43eaf21bfabcb…

MALICIOUS

PDF

88.8 KB Created: 2021-09-05 18:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1133c210623133242ab931d771e91645 SHA-1: a835eb1b5c5932422071857feee49868e3bcccd6 SHA-256: b6d43eaf21bfabcb100be2b1cd2bebd92e7106af615dc0ae71d11975f265e7bd
116 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised WordPress sites, acting as a link farm. The ML classifier strongly indicates maliciousness, and the presence of multiple links to potentially malicious content suggests an attempt to redirect users to phishing or malware hosting sites. The document's structure and embedded links align with tactics used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38fbeb1834---24631278516.pdf In PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868b6807bd7---53784294688.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b463681fb32---88051490744.pdfPDF link annotation
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160f139346ac4a---gufan.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/d1373fc05be74bae68544be73699b111/99857785947.pdfIn PDF document text
    • https://promise-land.com/upload/file/27942328706.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/etc4k0c1aid4tud5ipjt264f06/42130562110.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/bojadazijelukigo.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a871c98cf11---25775874904.pdfIn PDF document text
    • https://mikludava.lt/images/files/vogaxurilexikinuwovobem.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2b1679a4---98089469981.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac941907648---rivadupozolelojozex.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/tupugotoriwoxafufuj.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88b070425---31792895579.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/15626047775.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae01f444302---bixojufaloxonavosako.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/dubudojapovowuginowadilud.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160851457d3a37---degexanamodalojefamika.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/91336906283.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/56373312393.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/1288764235.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/xunitubakujodakis.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/jedinofuviretifufira.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=print+to+pdf+postscript+errorPDF 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_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 10408 bytes
SHA-256: 19101bad7fbaf2ba4e9b4850b3c1bf7fcc9c1b6707370d9db99cc0547b1199ac
font_01_sfnt_off0001115d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001296f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296F 17100 bytes
SHA-256: de01833568c5ac141d5dc78febba16c973ab8b818af1bce7415a3ba8d51d7d39

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