Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ecada3b6cd3351…

MALICIOUS

PDF

75.8 KB Created: 2021-09-03 10:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fcc0828316a78a264953dafd9b457545 SHA-1: 45e1081c7dadd028cbfe06dd6aac3793e576c744 SHA-256: 61ecada3b6cd335199c871469918c966484bc50d0cef9b373a17a558db894afc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for malicious redirection. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The presence of embedded URLs and the overall structure suggest an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://webbuilders.com/files/file/92191953695.pdf In PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/latoduxukekuluzid.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/5458171386.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/26302205944.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/79423872039.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a8931bca901---gulebisewunanomadotadag.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/83883306199.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/lajitezufumo.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868d6563495---barerixefaf.pdfIn PDF document text
    • https://summit-christian-academy.com/scauserfiles/files/40039427447.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/wugosizijaxejogezozawi.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/7736443367.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/votajumi.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701677ca357---jonozepis.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/vowepexexefarepamaxa.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b597e638892---95412040882.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/35217875074.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/c0eqmnqong92fah8slh5bjqiq7/gerum.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/18308c1421d3b70a99e72066b177e6c0/87321619119.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/fosadudiloviwebaxadezim.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/6at01vanqkhhmdsi2t4qj7sln7/12718386945.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/ledoxudenufopinisavaruve.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/890a06d51c0c25cad1a372dccc1f2b40/jarubofoxuxabajeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=child+and+family+welfare+policy+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_off0000c11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11D 10852 bytes
SHA-256: 42b93896188a9385ce8d2e722fe239d607a5662e836d776db197ebed5a98a263
font_01_sfnt_off0000d9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F8 18220 bytes
SHA-256: 81a5d348ba0e6e7bcfee003986e76725ab24d00f455302b78e238ee339b8f92e
font_02_sfnt_off00010996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10996 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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