Malicious PDF — malware analysis report

Static analysis result for SHA-256 8094751b88e7ad9f…

MALICIOUS

PDF

92.0 KB Created: 2021-07-28 07:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 48440f3d62047927e9b0506f98f49e7d SHA-1: bd4840700b698b5196f3281fbdc7b27c5de6be1c SHA-256: 8094751b88e7ad9f4a145d648648669374a24a4786a2b868f6d3f36c7eb63563
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and the 'link farm' heuristic strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • 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 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://caffepontoni.com/uploads/file/wivuzosulategujemerom.pdf In PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/zixusalasogumukirepodexa.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7a8d34b15751a344e3af51d1dc820dd2/samesawizememo.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/13408850483.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/sefejowofozaponenugawugin.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/5018110.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/defotanoteduvikalinakofo.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/56304572820.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/9011948942.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/90c3c0b3317732c0ef88ca8c1c86f77b/misonimudivobujogo.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/f3c1627de455d98ec624e29d92944352/talabofisebexak.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/cc13fd8939ff8db3468411d5f6d51ff3/93253346428.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/5348960684.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48504616818.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/aa7ac301999b3370557979960d927533/josesalenovutad.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc5016208e---11426062100.pdfIn PDF document text
    • https://cmoretv.com/userfiles/muxitut.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/ziriwuvur.pdfIn PDF document text
    • https://botroul.be/uploads/zorogajotawafutoke.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/datezugopajudokejumifa.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3071819e16---wijedojomawixiwuv.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6d799c7e6---17964615593.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=titanic+pelicula+completa+en+castellano+original+1997PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001139e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139E 18992 bytes
SHA-256: 323e171554f54975623b26604880e1cd923df85f928d9620959097798ed80eb0
font_02_sfnt_off000144d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144D3 11052 bytes
SHA-256: bcaa26d54eabcea5ac0e40a853a96fd067e9ccca9ef667175f13a4e6573ef32e

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