PDF malware analysis — malicious · c7c30b1d63e3fed4

MALICIOUS

PDF

89.5 KB Created: 2021-07-24 17:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 2a1f93c1045995acab3d4e6fbe881b54 SHA-1: 7a1af38209a0a0c7ef25e5dcc40861c6e53fcd21 SHA-256: c7c30b1d63e3fed4d5274233c85376ebd116ff7f0dd6c3e528b6479354c701fe

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress upload directories, suggesting it is used to redirect users to malicious sites. The presence of these links indicates a likely phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/oeie83kss2ca1du0ufnuv7anl5/jigaz.pdf In PDF document text
- https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/49mqkr5o7he6u5682o56q7aeak/48924917204.pdfIn PDF document text
- http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e47ca5321---nuguxuxeluxizabutizifalam.pdfIn PDF document text
- https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085b048ea08b---96443331774.pdfIn PDF document text
- http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4df874bb7---8314475248.pdfIn PDF document text
- https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607afe2be3280---44534381576.pdfIn PDF document text
- https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608538370e1b8---gitesibazej.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5c48199936211e39de3f6011c7381a83/98654827846.pdfIn PDF document text
- https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/13def309ca79ff7d4f6fe6be19f30a9a/nopawujumagamiv.pdfIn PDF document text
- http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608444c3267b6---rivovafufaxegedezu.pdfIn PDF document text
- https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/0r5c0vi1fsuclp94q2k69k8un2/xatusinutarosu.pdfIn PDF document text
- https://woodfur.in/userfiles/file/kipanapobiles.pdfIn PDF document text
- http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075b63591b8c---56206051764.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-5-4/20210504085600106397.pdfIn PDF document text
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e929ae2e75---7591993203.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/b1prfq7r32ojb13824alhqcsk7/fuwijemitozuwuna.pdfIn PDF document text
- http://xmst.com.vn/app/webroot/uploads/files/xoxigesorefedagamekog.pdfIn PDF document text
- http://arisutour.com/ckupload/files/rupuvaxabatolebadijew.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/3039c633b9979cedfea227560d0fce19/32316478474.pdfIn PDF document text
- https://scanclean.bg/upload/ckfinder/files/rusuvi.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0461cac00---96450704723.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8e0207859---dozes.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c17de268ccc---pizowofiwaludezojetegured.pdfIn PDF document text
- http://kotolantopeni.cz/file/xesuwivolobepetaguxoliwi.pdfIn PDF document text
- http://www.nomorcantikjoss.com/file/lasirufitexi.pdfIn PDF document text
- http://dolphinegypt.net/userfiles/file/98360928197.pdfIn PDF document text
- https://dodomacnosti.net/data/file/voxal.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+create+a+cover+page+for+a+portfolioPDF link annotation
- 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_off0000fac7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAC7	10528 bytes
SHA-256: `d6c5e41a753851f12f6cb9053de6105264e5a3542eabf2d167eaf1bc27098b4d`
`font_01_sfnt_off000112df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112DF	17196 bytes
SHA-256: `7a7749f097c9a5a0255742d43c383410c2aa8d8520d807d5f9b06691498d9c42`
`font_02_sfnt_off00013f5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F5B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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