PDF malware analysis — malicious · 127d634324a906e0

MALICIOUS

PDF

76.0 KB Created: 2021-09-18 03:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 35e8996937f2125f3aae3b6367ab2891 SHA-1: a1cbbb103b8b57b2f4cc3adf2a01ffaad2c93358 SHA-256: 127d634324a906e0ba93c71c6cd537d7c436aadf3583149c7f4f4d7bb6b640f7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to various compromised WordPress sites and disposable hosting, suggesting a phishing or credential harvesting campaign. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://chcial.ru/uplcv?utm_term=footprints+of+the+outsider+pdf PDF link annotation
- https://sportuna.be/ckfinder/userfiles/files/82524044642.pdfIn PDF document text
- http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d1f4d6b6d---77450356881.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/3e872b3b287d1abf9fb51dfc57847dba/52756928377.pdfIn PDF document text
- http://capitaldanceacademy.com/userfiles/files/rivubukebow.pdfIn PDF document text
- https://alate.org/admin/fckeditor/editorfile/40860369444.pdfIn PDF document text
- https://myparrotfood.com/user_files/files/bevuwedimereketadifiwi.pdfIn PDF document text
- https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/q04ofng2hvgs0nt8grdoh62lr6/sipezipaxiliroja.pdfIn PDF document text
- http://vuatoyen.com/uploads/userfiles/file/toxomufesufizeda.pdfIn PDF document text
- http://mdknoodles.co/uploads/files/22064572813.pdfIn PDF document text
- https://kratky.eu/files/file/tojelanimewuxaxapamidem.pdfIn PDF document text
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a80d2e8c2aa3f28094d0012d4b810855/pesozofaxolitolid.pdfIn PDF document text
- http://speaklifeiamgreatness.com/files/files/sutumote.pdfIn PDF document text
- http://bio-scan.com/userfiles/file/munomulemusisudamapaxa.pdfIn PDF document text
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ebaf7b3429c86ce1b348c66b0931ddfb/38160774479.pdfIn PDF document text
- http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161437eec1ad70---riparovam.pdfIn PDF document text
- http://partnercable.com/files/noful.pdfIn PDF document text
- http://avvocatogiuliani.it/userfiles/files/favuxoresebikuxafoludaf.pdfIn PDF document text
- http://kleinschadenexperte.de/userfiles/file/32116832721.pdfIn PDF document text
- http://odpadykj.cz/UserFiles/File/xolevima.pdfIn PDF document text
- http://banlinhkienlaptop.com/userfiles/file/35249182272.pdfIn PDF document text
- https://hantverkarenisandby.se/UserFiles/files/78326594568.pdfIn PDF document text
- http://evola.it/userfiles/files/19217702336.pdfIn PDF document text
- http://net-work.cz/data/file/30548389625.pdfIn PDF document text
- http://archiw.bibliotekalesmierz.eu/img/upload/files/gimepazerijikufukes.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142072a4be36---bakuwamuf.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_off0000c558.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC558	17504 bytes
SHA-256: `f851deec7487bb5f3a5a41676bb0ef1447ab0d9b186de8c9eb77a9a7f0d5fa89`
`font_01_sfnt_off0000f264.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF264	10464 bytes
SHA-256: `d4523e64ab17be5260ebff2c8afc58bb323b69e43facaba6836de1b10fb92032`
`font_02_sfnt_off00010a12.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A12	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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