PDF malware analysis — malicious · fcea4fd37bbea5d5

MALICIOUS

PDF

86.4 KB Created: 2021-07-13 13:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: b0d7adcf4755760bc83a857a8c2b6a99 SHA-1: 2094f50568c4e0b4d498472c26ac15884184c2d2 SHA-256: fcea4fd37bbea5d5eae99f8d007c3c5ca7c4272837f569d8dd1f6fe5bb64e322

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The document body is unreadable, but the heuristics indicate a link farm designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://oniceh.ru/uplcv?utm_term=pi+industries+share PDF link annotation
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceac6ba496---74288892770.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ec515547922---likewuj.pdfIn PDF document text
- https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/7cb9e520bb2ee99192bb3f961ff4f3ee/36329322649.pdfIn PDF document text
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e8743dd1ab890efec974cd30c052eb80/wufedivoxefanozufimoram.pdfIn PDF document text
- https://sasalidayanisma.org/uploads/file/rukejekopafadizoxiguj.pdfIn PDF document text
- https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/wokusofinotakunuzijawav.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/638b592c47ba11d8bb2321ac28c2eee3/86506890228.pdfIn PDF document text
- http://www.irrv.org/uploads/files/ragimaliginitofa.pdfIn PDF document text
- https://africanresearchcenter.com/userfiles/file/tozetekufarowavi.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/ec228e84a3d92a79905b25517320e2d7/45210130619.pdfIn PDF document text
- https://migger.dk/userimages/file/29296358061.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a995d5bf08b---popebozubonebidokigow.pdfIn PDF document text
- http://spalovnachemolak.sk/userfiles/file/16673067004.pdfIn PDF document text
- https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/39f9beb4a633cbb88be5aa7def0223dd/kesokigelefisozep.pdfIn PDF document text
- http://youngshiny.com/userfiles/file/1625715200.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/gosoxisutimisijevi.pdfIn PDF document text
- http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078439f47770---27206480691.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/7044500e7ed91705fe48616143ae44f5/silomigan.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813a41c1065---wevogafo.pdfIn PDF document text
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/8a7c65ba463883cb474d0ef3124327ba/forosebomu.pdfIn PDF document text
- http://pivotal-technologies.com/userfiles/file/5535026549.pdfIn PDF document text
- https://aterhesseg.com/up_image/file/65579244504.pdfIn PDF document text
- http://marinapogon.pl/upload/file/dokar.pdfIn PDF document text
- https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/qotr6ttij3odcbaiv23pf5v6fu/wufaneduwufapedudafobuj.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcb0f66535---81264735743.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE65	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001067c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1067C	10280 bytes
SHA-256: `c4db96e4098402c92891594ad7a1e161be6ce2fd4dff68a5656812f064143b0a`
`font_02_sfnt_off00011d87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D87	17776 bytes
SHA-256: `1e937be3b4d68f9d3784404470aef590c795d8587347d788b0ba2eb8215f1ba1`

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