PDF malware analysis — malicious · a749cd06680448c1

MALICIOUS

PDF

82.1 KB Created: 2021-07-04 23:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 1298a389138d3d3dd0f13bfd643671f9 SHA-1: 1253de5f51be6eabc86e7c60d1f4430d2c67680b SHA-256: a749cd06680448c15adeca818cdab835d1743c2a6d08ad5b203ab26c473f832c

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 compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of numerous URLs, many hosted on compromised sites, indicates a likely phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=lee+cummings+the+negro+question PDF link annotation
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160791713cbf9f---beginoga.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/038be49129d35aaf69088b17c8c0cc1e/14054354554.pdfIn PDF document text
- https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/264173h22e9utac3lqan0a3tjq/14053956181.pdfIn PDF document text
- https://bikeid.net/ckfinder/userfiles/files/56821055063.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c031170558e---rijon.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/c204599892e4bf84ae40215e227880a7/rejugotawisobete.pdfIn PDF document text
- https://profipreklady.cz/www/ckfinder/userfiles/files/puroxududutufuromuveji.pdfIn PDF document text
- http://unsersohn.ch/images/file/tesep.pdfIn PDF document text
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b087622c6d4---telorana.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097dba689e6e---45837918780.pdfIn PDF document text
- https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/9f21f95b0e1e7d27f31dfc341c8b77a6/gomakilelodefexuwipe.pdfIn PDF document text
- http://ajarnveerapong.com/UserFiles/file/kisewejukoke.pdfIn PDF document text
- http://leinerpakgelatine.com/survey/userfiles/files/futasidivijileposuwo.pdfIn PDF document text
- http://soldearenales.com/galeria/files/pukopuperefabote.pdfIn PDF document text
- https://hotellemaritime.com/hotel/upload/files/feperugowetedobisix.pdfIn PDF document text
- http://zwickerfoto.hu/_user/file/gefet.pdfIn PDF document text
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/2410129f3e02831264bbafd5183329f1/vazerinewarewitugag.pdfIn PDF document text
- https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ad74d58ede4---ligalozatasobusunuvaxe.pdfIn PDF document text
- https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/f8p3ncrf6nfj4i19e3goa0etih/luzasijomukur.pdfIn PDF document text
- https://kovosluzba-praha.cz/res/file/falojunumilefaputofudive.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7b6e9e152---71418724835.pdfIn PDF document text
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/m1fin020sdj28f0s6d8mrrpq4s/vugizelowakujoneriwo.pdfIn PDF document text
- https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/ado2nqb62unrt0eg5cb46e7klj/55212253465.pdfIn PDF document text
- https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/b7801417df805734f585ae91a06ac81c/xakirivizewarimetofuse.pdfIn PDF document text
- http://fullcolorspandoeken.nl/userfiles/file/77082094917.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_off0000dab9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAB9	18280 bytes
SHA-256: `d6839b0c62a4950e19269713a6d07f8a1ef152601daa8296ead0067065b61e62`
`font_01_sfnt_off00010af0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AF0	10672 bytes
SHA-256: `bbc490b44bffe8774f434b594a2a961f9943a091f730f82b1bd974c77f164a43`
`font_02_sfnt_off000122e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122E4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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