PDF malware analysis — malicious · ecb65c19d2beffe1

MALICIOUS

PDF

90.3 KB Created: 2021-07-12 23:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 2591537e2cb113df3e2addde49e1db84 SHA-1: e9bd036fc891424a72262107994d8362ab4337ab SHA-256: ecb65c19d2beffe19606c710c656b960ab4300163cc035268c3ef999aa2c5a53

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://allytemp.ru/uplcv?utm_term=eye+itching+and+redness PDF link annotation
- https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/fu45qhffpd95pcmrgjqtn0inpb/kifawokikeposik.pdfIn PDF document text
- https://angkoronetour.com/userfiles/file/45521124258.pdfIn PDF document text
- http://dzbnf.com/upload/file///sidogix.pdfIn PDF document text
- http://www.toeterloeh44.de/files/kirap.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/24e262e7e7579883c65eb40c80e258f1/kolegunejunusetavudezazi.pdfIn PDF document text
- http://www.bandungmesin.com/file/bimuzozaxedisaxe.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1b15930ed---98114144801.pdfIn PDF document text
- http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160758c1a6a95e---98211083771.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607024f9e8e75---50477475838.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-5-19/20210519204534218808.pdfIn PDF document text
- https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b55cac9b54---bumudafanaziwalo.pdfIn PDF document text
- http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d94662b146---17243209832.pdfIn PDF document text
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ef9e4aa75---xenos.pdfIn PDF document text
- https://haltia.mx/sii/ckfinder/userfiles/files/bobumidafubobutufiwiji.pdfIn PDF document text
- http://solmoda.it/userfiles/files/gexegojejofurexoje.pdfIn PDF document text
- https://10glazsikeyrosa.ru/file/95267701963.pdfIn PDF document text
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08c9c8199f---rukizakevox.pdfIn PDF document text
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/gj5mlhl7flv3e9fhrpk0a625p1/nolex.pdfIn PDF document text
- https://computerzone.pk/file/84808271206.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609487715fe5c---85980552987.pdfIn PDF document text
- http://sooclose.eu/upload/File/gibitukasawamebur.pdfIn PDF document text
- https://srldirect.com/ckfinder/userfiles/files/zezujugaxawinukevudoz.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e6fb5c95f---14018131987.pdfIn PDF document text
- http://studiocalderini.it/userfiles/files/sakulavixawe.pdfIn PDF document text
- https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/046320e58bd0525e2c41df5497cc9a92/89258543292.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/40423bb37ecb2cf654ded72fb20ca7a5/gipilulanufoz.pdfIn PDF document text
- https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/qv42slm6kav7l1f663rna58c93/34264378852.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_off0000ffc5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFC5	16896 bytes
SHA-256: `077aecd06848033920175e904e361909f30a024eb798e4909760679df4b9a962`
`font_01_sfnt_off00012bef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BEF	10580 bytes
SHA-256: `fcdf54a3ea02ff17d259cb949effa6909cee78e8fe66d5204a8fc618dbe43b3d`
`font_02_sfnt_off000143dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143DC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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