PDF malware analysis — malicious · 73fa39ba8aaceba7

MALICIOUS

PDF

90.8 KB Created: 2021-08-12 05:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 1d44069f779f38cc91d1ee4f37c42553 SHA-1: cc3947d7f1d67b9f2c12a2430e4311fab64daa34 SHA-256: 73fa39ba8aaceba7ca4eb2f1ad16af451bc0a8d43a5a2d66ec46819c3704455c

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and a visual download button, suggesting a phishing or malware distribution scheme. The presence of external URIs and links to compromised CMS uploads points to an attack pattern focused on luring users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://synerhu.ru/uplcv?utm_term=perfume+the+story+of+a+murderer+movie+download+720p PDF link annotation
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108d0b8ebb38---27903268783.pdfIn PDF document text
- http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7b491d739---89592270012.pdfIn PDF document text
- https://ketex.com/trcgp/ckfinder/userfiles/files/xewuvubafafusugiwowobe.pdfIn PDF document text
- http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/8767429889.pdfIn PDF document text
- https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/43d8e59d86de2b09d4a9b7b3300612cb/busiwanadivun.pdfIn PDF document text
- https://dichvumoinoi.com/ckfinder/userfiles/files/4723101443.pdfIn PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16088e5ab45e7c---90355375536.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761972398b4---55414992023.pdfIn PDF document text
- http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/90201639952.pdfIn PDF document text
- https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/spj445b59vh9scpor2jcs8lpfe/newapa.pdfIn PDF document text
- http://fitviewer.biz/files/file/89199066861.pdfIn PDF document text
- https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/121d2961038e26ee6664c2894d269ca0/sivelaretinubijaxinef.pdfIn PDF document text
- https://ph2020.org/ckfinder/userfiles/files/nexetamelofajupe.pdfIn PDF document text
- http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30a0600d12---77881437425.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd05b6bba2---fuzarubuwugab.pdfIn PDF document text
- https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606c7d28da64c---4789721128.pdfIn PDF document text
- https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/e5adcf8a298cdea7437824fd6aeca1fa/zukunapejimeforinikotopi.pdfIn PDF document text
- https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31f57c42dc---67380045512.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ae6d1c137---15316728450.pdfIn PDF document text
- http://hainescentreasia.com/images/file/motusuz.pdfIn PDF document text
- http://pospatrans.cz/UserFiles/File/zopewupodowuxexalexex.pdfIn PDF document text
- https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/39b95b9e600c638aee482e44c3b79f4d/vokiladuxuvez.pdfIn PDF document text
- https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/83105945c7541effd2d513fb58241ddb/64683366042.pdfIn PDF document text
- https://anthonygillant.com/userfiles/file/xazop.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_off0000fc1d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC1D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001142f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1142F	17144 bytes
SHA-256: `70c011be688c2a67d1cde16cfddb0029cb92a97933d76d3471feaa2e6008718b`
`font_02_sfnt_off000140f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140F9	11424 bytes
SHA-256: `65ab5e4a7f297ad699e665aca7091429597ae73e50ce6f075560b04efa86cc01`

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