PDF malware analysis — malicious · f75af6a5925c5c3c

MALICIOUS

PDF

83.5 KB Created: 2021-09-02 03:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 2cb3c27168f663eb8d24cc1454f2eae0 SHA-1: 31f8153fecd630b15d9a8e65ade3e382e628c48b SHA-256: f75af6a5925c5c3cfaefa1981913ce76cd647f4e5a0d02c1c95faa0deee31f9c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised websites and link farms, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are indicative of a tactic to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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=new+blouse+design+2020+latest+images+simple PDF link annotation
- https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/50af949c3616e450b611d836412a3ddf/79426658010.pdfIn PDF document text
- https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071aba865dba---48784962975.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/60d90de2f495f8f2ccfefa093758423f/furebok.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86303358f---16629771670.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ecb73cde1---xupuduroti.pdfIn PDF document text
- http://pc75.net/upfiles/file/1623952501.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/35feba8f3e5e8744fd4b7a16c51d2497/warafogoridawakifi.pdfIn PDF document text
- http://www.naraihillgolf.com/admin/userfiles/file/77475671399.pdfIn PDF document text
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/11e45a7d3fe37000572c0dfbaa6bdaf8/8072520355.pdfIn PDF document text
- http://pm-ural.com/uploads/files/2134918667.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ca31d3129---27432660049.pdfIn PDF document text
- http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f09acb6ad5---mawepix.pdfIn PDF document text
- https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/eee0eb7196def5299c0c287c50844eec/monuvolitaxasip.pdfIn PDF document text
- http://grandinhr.eu/images/user/file/20950908142.pdfIn PDF document text
- http://yaan121.com/uploads//files/202108070809265463.pdfIn PDF document text
- http://faradbox.pl/files/file/67703238117.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/63b59434950d432dfe77bf90dc9a2a8c/ximafe.pdfIn PDF document text
- https://shipnhanh247.vn/asset/files/38064575764.pdfIn PDF document text
- https://art4you.sk/editor_uploads/system/files/40037053547.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/0d603d290e5eb707a62dca9c058f6273/75078034391.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a1c8c2b8f886ab161a9c5279c4735cd9/90785933851.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64c4865b65---lerukogidupamasenebigizop.pdfIn PDF document text
- https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/719672da6aa5cef479329fcc380f2478/venifuv.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_off0000e17f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE17F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f991.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF991	17236 bytes
SHA-256: `d7e6675feeee73e265cfee48d52fdfd280e8f591f5f6ba71d5774f65ed8f940f`
`font_02_sfnt_off00012601.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12601	11180 bytes
SHA-256: `291e5209b9cf065b08c56265edc619aee70c3390f9f362a4a77b9bca786d5702`

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