PDF malware analysis — malicious · bba5133c9bb64cc4

MALICIOUS

PDF

91.8 KB Created: 2021-08-17 18:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 831d08292b4b3c4cac41a650502a3820 SHA-1: cfe37b4a58f5414bb0f752fec18b87ee78c76951 SHA-256: bba5133c9bb64cc43b997ba082edc8da5f2d4ac8e4ea291b6b180674bf2490b5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

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 numerous external URLs, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9930

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://garglob.ru/uplcv?utm_term=how+do+you+pass+a+competency+based+interview PDF link annotation
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/0k7u735srfc2u686ku1u11btv1/saxusonizojigokuwe.pdfIn PDF document text
- https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/585d2a7ba6351d5c9b71fe547021a2a2/bikegesipexut.pdfIn PDF document text
- http://kag.fr/userfiles/file/wudikurir.pdfIn PDF document text
- http://eyupsifalibitkiler.com/resimler/files/27229256513.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f1ed6d9c96cf5451fee3d5e3b9b0e6af/konafinilidifuju.pdfIn PDF document text
- https://kcharp.com/ckfinder/userfiles/files/fimeterozepakomizajoripa.pdfIn PDF document text
- http://dachastyle.com/userfiles/file/70871839912.pdfIn PDF document text
- http://protok.pro/upload/files/bokijuluvowebimekuzebaje.pdfIn PDF document text
- https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/b9aba402894faa915d9a8ebc39d47344/89203604082.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926eb608b78---27085225661.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/b90726d67b0f1611ce8544974d6f72bd/rusufibozasanojukin.pdfIn PDF document text
- http://vonschickenconcord.com/uploads/files/neredexuzivexagiga.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9449c1f9cf---bedexisax.pdfIn PDF document text
- https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/a190a82eb8aef97dc7427ae13edcd68b/22480903714.pdfIn PDF document text
- https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/80454794074.pdfIn PDF document text
- http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/zowasawil.pdfIn PDF document text
- https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b279e98881e---93625982132.pdfIn PDF document text
- http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff565da3f8---tenodifexokaxozato.pdfIn PDF document text
- https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/hcvg92097hreo91n2llhooohva/gopepovisujezuzigozuk.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988854a1cdb---busar.pdfIn PDF document text
- http://escrima-rlp.de/userfiles/file/65469661290.pdfIn PDF document text
- https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109007a11da0---vilivekarukaf.pdfIn PDF document text
- https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/0946cdc98ff6b71fc89c92c759001aee/88686706781.pdfIn PDF document text
- https://namdolove.com/FileData/ckfinder/files/20210722_E807653B283B8A45.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e984.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE984	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010196.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10196	17268 bytes
SHA-256: `94d709c7834dc6ad68040a0b1922686c2e5465f97fc1fbcf161605850edb0f9c`
`font_02_sfnt_off00012e78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E78	16416 bytes
SHA-256: `a8d1e34bf444334761db8dd673e30599a677bf9ec537d4b136fd145dfe542046`
`font_03_sfnt_off000144e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x144E9	11128 bytes
SHA-256: `4b4a2512da28381e26e40dc48438b5c21cd5b0c0b6e63ffd6d7beac421553464`

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