PDF malware analysis — malicious · f55cdeb2154bee26

MALICIOUS

PDF

135.8 KB Created: 2021-07-20 19:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 1149af9abf37f9a65035e171dbe378b9 SHA-1: 6d3d93df66b1a620e3548043b0f0e718d43f9eee SHA-256: f55cdeb2154bee263fadbf8d64414778090f54b42ce427f48cc6c345776ae122

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple distinct hosts, many of which are compromised CMS uploads or disposable domains, suggesting an attempt to obscure the final malicious destination. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9708

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 https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/da4ed0f6646f70bbccec9e9b0a8ce1c0/dobalafejegipig.pdf In PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607137ba8d7f6---guzapobixeni.pdfIn PDF document text
- http://writtenmail.com/upload_images/file/jonasiwapogut.pdfIn PDF document text
- https://prana.video/wp-content/plugins/super-forms/uploads/php/files/qbl3089a1sne2f56u9h02adtqh/bilizikenala.pdfIn PDF document text
- http://immobilieninvestors.eu/userfiles/file/77712557521.pdfIn PDF document text
- http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b73e50da30---60523734013.pdfIn PDF document text
- https://ewastexperts.com/userfiles/files/59401749300.pdfIn PDF document text
- http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16095779be8008---26431703812.pdfIn PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/f61e6a8a340da547eae1c2c7ac69806b/gebabebusufabazapun.pdfIn PDF document text
- https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/3c8b99933bbf577072bf0ef4b81da5e0/8610881624.pdfIn PDF document text
- https://tepihtrava.rs//files/buropawekovaviseparomodo.pdfIn PDF document text
- http://mytmbc.org/fckimage/file/43030611555.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/ce2b574debacba2134ebf8e90ea607b6/numuxenidege.pdfIn PDF document text
- http://bawwabatrizq.com/userfiles/file/80072992544.pdfIn PDF document text
- https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/462047fd61f3611af93a1ce65b5c9e0c/67470957356.pdfIn PDF document text
- http://huucodatlanh.com/userfiles/file/porepopegupotuz.pdfIn PDF document text
- http://ladyvenus.it/userfiles/files/64159743595.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ae4671aa1---42583337671.pdfIn PDF document text
- https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/p27m64kscujfrqs9g4foj38lb2/7234314443.pdfIn PDF document text
- https://terryhaas.com/wp-content/plugins/super-forms/uploads/php/files/98f90b2099b8898da16d592045a9854f/5926141586.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798aa97ba6e---13507888125.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090c4627887e---25192320170.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b838733e3be---saxujafolifuzegor.pdfIn PDF document text
- http://oilandgaswork.com/userfiles/file/43575387337.pdfIn PDF document text
- http://bidhichand.org/sahodyatarntaran/userfiles/file/lajufu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=gabriel+in+the+bible+meaningPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00017cb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17CB2	25328 bytes
SHA-256: `3cf654b1d78c8c61d8669a1b3492ee9f62bf37d9491e694aab9988ef063baf33`
`font_01_sfnt_off0001ac8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AC8F	10448 bytes
SHA-256: `302d0223bab588a66ba8631b089bd589740c85433803fab8ce0eda57cad0cef3`
`font_02_sfnt_off0001c404.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C404	21724 bytes
SHA-256: `f239f1b085e384878d6968d93f63a8c6070b1e629363f36bba17c5650051b226`
`font_03_sfnt_off0001fa3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1FA3D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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