PDF malware analysis — malicious · d98d6529ea3cefd3

MALICIOUS

PDF

88.9 KB Created: 2021-07-04 10:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 5e51d8571a1bc82634141df3432d9e31 SHA-1: d8e6960b045768ccfff5ccc4a1697d802889d325 SHA-256: d98d6529ea3cefd3c6ebefaff63072ebea321a1efb790339d7ccacaf99dc9a32

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of these links indicates an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://schokobrunnen.com/idata/34796366898.pdf In PDF document text
- https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/1b5069761617a96711d6b645246390a2/68170249407.pdfIn PDF document text
- http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082e7e16b165---5593632301.pdfIn PDF document text
- https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a050e610ac5---40053239301.pdfIn PDF document text
- http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4c606f769---lituzarugazadupazogave.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/097b0c0d234f5bb6c5afc2368dc4fb10/89327019460.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db06f95579a---poreriwimezoti.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dac50760e6a---73469298949.pdfIn PDF document text
- http://dchs80.com/clients/c/cb/cbc185099defa3274d3d4f74835fd64f/File/xipususorifila.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e2fac13a4---59538189584.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/5700ed7d31ce547daed428349f66e2a7/xugokimakaxugoba.pdfIn PDF document text
- http://naturalmis.com/userfiles/file/17151894272.pdfIn PDF document text
- http://www.empresshasnoclothes.com/siteuploads/editorimg/file/3413019609.pdfIn PDF document text
- https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/hqqvppfvbv5t3os13hdv39j511/nupunedi.pdfIn PDF document text
- https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/87b9993a9f4f14e3a9d0f7be7e485587/xilosal.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dc3327b6e---97622630357.pdfIn PDF document text
- http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/21838472848.pdfIn PDF document text
- https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4603ff8a---nutexivakisuvisitavifigiz.pdfIn PDF document text
- https://matskaren.se/anvandarbilder/203/files/soworafezupej.pdfIn PDF document text
- https://advance-pack.com/editor_upload/file/84083998835.pdfIn PDF document text
- http://cesnek-vysocina.cz/UserFiles/File/9851727598.pdfIn PDF document text
- http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/f8c3adba544d2f5e9591dfda4dc4abdf/74087384796.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c443035a4b1---54954519834.pdfIn PDF document text
- http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b821c64faa5---limabujapuw.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0ead3991ac---86343896763.pdfIn PDF document text
- http://internationalnetworksolutions.net/files/womifaru.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=tinkerbell+secret+of+the+wings+full+movie+free+downloadPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f6a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6A0	11368 bytes
SHA-256: `014829c18446245cda750b32936fb6fc938bc9701f33179716b8cced316e218b`
`font_01_sfnt_off00011120.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11120	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012932.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12932	17052 bytes
SHA-256: `2e9de6feb6853f95a1387ccb0baa193119359b26af0faa240128acdf47d4ba7d`

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