PDF malware analysis — malicious · 7b81f2d32a0d2012

MALICIOUS

PDF

85.5 KB Created: 2021-06-25 17:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 5899cc490a442401b23c52e930225c17 SHA-1: a23c06ce393113cc69233ff27d86b2db3d41c997 SHA-256: 7b81f2d32a0d20121d5ff8a82065099d1883a0eff3120279f95dbd265201a224

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, embedding numerous URLs that point to compromised websites and disposable hosting, likely intended to lead users to phishing sites or download further malware. The presence of multiple PDF link farm heuristics and the ML detection strongly suggest a malicious intent to exploit users through redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=applications+of+photochemistry+in+daily+life PDF link annotation
- http://ixtvs.de/_upload_bilder/_filemanager/file/62298244927.pdfIn PDF document text
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609d94b876077---fevijod.pdfIn PDF document text
- https://masterjobintl.com/ckfinder/userfiles/files/44075404534.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e8e96b633---xisulefu.pdfIn PDF document text
- http://leaguengn.com/userfiles/file///vogulowupowena.pdfIn PDF document text
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/c751affb426e3d1ae84816fa153328eb/9314861932.pdfIn PDF document text
- http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e1df0a488---4274573614.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16099145259d99---wivuxakaloxi.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5becc6c35c---61720169266.pdfIn PDF document text
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/4418f433fd28da038da7c7e9fc64a726/68416245923.pdfIn PDF document text
- https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e7abc5241---zodejalo.pdfIn PDF document text
- https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a091ba8b196---44121358094.pdfIn PDF document text
- https://sasalidayanisma.org/uploads/file/lawiwolifinamexob.pdfIn PDF document text
- https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/0dc7e26ee4bd958ecd6eca4b626075a6/60495877600.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abd3594eb10---9274531443.pdfIn PDF document text
- https://amrapalispot.com/userfiles/file/pusigotopetuxu.pdfIn PDF document text
- https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/c59480d01d8c8d81fc6561b42d6391ca/xezuradiziji.pdfIn PDF document text
- http://ayhancevik.com/images_upload/files/94148880118.pdfIn PDF document text
- http://tfh-filter.hu/_user/file/80755055571.pdfIn PDF document text
- https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/e9616cb1e49c8c733ea60cd28b2e3fc6/xedenolerogorasajelagobu.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a3983b07c---wosivexafi.pdfIn PDF document text
- https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/2a2185ae6fca8956d346215f44927017/22467709809.pdfIn PDF document text
- https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/d267603391abb3bbf5e548cace5ce2d1/fumixidukanadetu.pdfIn PDF document text
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/4c8db24f2399e826adda8c5dd3c825c9/pejarirajofukab.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_off0000e7d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7D4	10980 bytes
SHA-256: `d99854f816671d571b1d9ecb782cdabab057296e5703c7a299a57077d478ad24`
`font_01_sfnt_off00010128.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10128	17500 bytes
SHA-256: `469849dd8161a148ad9897aeb29c25319712211199533ec2253ff3d888b9a75a`
`font_02_sfnt_off00012ed4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ED4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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