PDF malware analysis — malicious · a5ce5361a1a5797e

MALICIOUS

PDF

86.2 KB Created: 2021-07-06 08:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: eb7cdf51b721d5f2cb1f27f3ed9ac4f4 SHA-1: 18242601dae107791a3b9c56317387d93018318c SHA-256: a5ce5361a1a5797e01b99f4d5f671207aed393d03266b76c198b2310ea7c28d0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and link farm patterns, directing users to compromised WordPress sites and disposable hosting domains. ClamAV detection as 'Pdf.Phishing.Trojan' and a high ML classifier score indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure strongly suggests a malicious link distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9877

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://laborke.ru/uplcv?utm_term=which+of+the+following+is+not+a+fixed+cost PDF link annotation
- http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/5066539082.pdfIn PDF document text
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160805397196a3---gavesetu.pdfIn PDF document text
- https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/68gru475ohsdmc262im4o9rbn5/lidijis.pdfIn PDF document text
- http://timnhanhonline.vn/upload/files/79848546539.pdfIn PDF document text
- https://cepatdaftargroup2.com/contents//files/sogewobajexemagiwawafumun.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079139d6f544---34193402635.pdfIn PDF document text
- http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6c417f6f9---12499382420.pdfIn PDF document text
- https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/bb4a70e9385309a38c4f82bbf868b82e/2415996681.pdfIn PDF document text
- https://dammesliepas.lv/ckfinder/userfiles/files/1361636931.pdfIn PDF document text
- http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c752659d0---kobititaduti.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0df50b96a---28926135569.pdfIn PDF document text
- http://trustarshida.co/cache/fck_files/file/25309231193.pdfIn PDF document text
- https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb3c570bc---46917665844.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a787532cae---98932534235.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e13eea624---92965597675.pdfIn PDF document text
- http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca76e539e1---41902619079.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c35712d7b99---5564495616.pdfIn PDF document text
- http://childhood-matters.com/clients/49507/File/81335222744.pdfIn PDF document text
- http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc3554b605---23289883675.pdfIn PDF document text
- https://kawanmto.info/contents//files/54192794823.pdfIn PDF document text
- https://drivetripper.com/userfiles2020/files/8823952718.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/rgahjp8vhb10dfjvqb7p0h8ot3/zevuborewovibit.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/21e9bdc1482ba08271b3d21956dbea61/sezukizu.pdfIn PDF document text
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ae172b73b---beroxasemog.pdfIn PDF document text
- http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f2e83d1fa---10022758850.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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d0ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0AD	16252 bytes
SHA-256: `a79031ac4fc80fb95d1a6113b8094496ec6808697b74f512249b00771ac3fdf9`
`font_01_sfnt_off0000e68b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE68B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fe9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE9D	16332 bytes
SHA-256: `1b22d812e7d6b8f76cc6668668d062f92f76700f62540097ccbfc5ef72ab31e3`
`font_03_sfnt_off000128c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128C7	1848 bytes
SHA-256: `a1c3892cd8a208b710687de54f9ca0e1996179b4ab82918aaf480618e4ca8763`
`font_04_sfnt_off0001316d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1316D	10836 bytes
SHA-256: `3da31c3c988c5448b951db3dbea4202bd6ef298bda9164a79a032c5fa5feda92`

Open this report in the interactive analyzer, or submit your own file for analysis.