PDF malware analysis — malicious · 1436dfa150149fc0

MALICIOUS

PDF

86.2 KB Created: 2021-06-28 16:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 112365f7b68b85c91ed9eaa251afc2f1 SHA-1: 128f7ff8f48181a01fcdbdfcb957756e0c1b9b99 SHA-256: 1436dfa150149fc081232c0751a9eec3871e2b2b89d4016b67ec15451b04c161

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and a deceptive download button, indicating an attempt to trick users into downloading further malicious content. The presence of external URIs and link farms suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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://smidgel.ru/uplcv?utm_term=ghd+tv+latest+version PDF link annotation
- http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/18232725472.pdfIn PDF document text
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f8a425d5---purebivusag.pdfIn PDF document text
- https://ratsimae.eemedia/contents/file/29051423894.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606e545c1694b---dewemasepiluxixosotido.pdfIn PDF document text
- https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/abc278ba464dcf9d698f8b3e4f1e4766/1763237538.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608371ed5a620---vizupize.pdfIn PDF document text
- http://www.cddfct.com/up_files/file/bigexubukoguxuwizatene.pdfIn PDF document text
- http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a492d2402---lipiw.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a05934d71---49137083102.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/b8ae382a6f8a2e19e7b3a212a31cc946/rusopijuwelotigigo.pdfIn PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826618db3e9---19872382794.pdfIn PDF document text
- http://parkhighclassof60.com/clients/871169/File/fevarusupegaxudixenilexor.pdfIn PDF document text
- https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/9bfda28b848ac73790c1ca7188187816/90638101182.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d6bf714f41f---dovusax.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773827cf69b---91305969820.pdfIn PDF document text
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/06d6e3a202cb137d5fdfd037f1fa88cb/bifafivarejobakes.pdfIn PDF document text
- https://5a.ro/ckfinder/userfiles/files/91822652775.pdfIn PDF document text
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160815b1942b8a---raxobulis.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/cgab25fqah27cvtui0b3n7pp15/33628951871.pdfIn PDF document text
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7d1ca18bd---zumegilulidukisa.pdfIn PDF document text
- http://yuha.be/_files/file/50021756585.pdfIn PDF document text
- https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/aca77fc06d33b37c9ace420f24067fd2/nivewafiwugare.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/4aqnmo5h0ksk0m8snst6e6hpd1/93059212618.pdfIn PDF document text
- https://meesens.be/KrMee/Tekstverwerker/33309214989.pdfIn PDF document text
- https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/3f14fb08bd2e8be109140220cb2ea3c3/76684302709.pdfIn PDF document text
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093d1aa901f0---gogifosokelid.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_off0000ed1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED1F	17836 bytes
SHA-256: `9bc652b166686d1b93a2bba5e5f77a84399bb6c1724cceec7deb7df2b814905c`
`font_01_sfnt_off00011ba2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BA2	10448 bytes
SHA-256: `578f92d3818766d5e9fb5c11bfbfe03f7492f41b6aedb5f70c0b5e98f03c2f4d`
`font_02_sfnt_off00013358.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13358	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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