PDF malware analysis — malicious · a58435285d0fafae

MALICIOUS

PDF

92.3 KB Created: 2021-07-20 15:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 0fd624676de9ac630547809616eae162 SHA-1: 224b01e78f9ec66afc89a1171b03c34d81e9fed4 SHA-256: a58435285d0fafae0936b72b685fa0b6b8ea7fdc381192d36d7e0bf00e582508

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics strongly suggest this malicious intent. ClamAV also detected it as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9786

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 http://dzbnf.com/upload/file///91452060490.pdf In PDF document text
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713cedd8f83---66424078270.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96e22ca85---zalujut.pdfIn PDF document text
- http://myucmas.com/userfiles/file/41284408935.pdfIn PDF document text
- https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/7353d9162ad3f29afe372ee1bcef9362/4195247187.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56ccf8b124---62031482841.pdfIn PDF document text
- https://ssmavidiyar.com/public/content-images/files/zetubi.pdfIn PDF document text
- http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/depaworonuwosazubav.pdfIn PDF document text
- http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c41bfa30a80---zemafuwe.pdfIn PDF document text
- http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/60288401947.pdfIn PDF document text
- https://aordonez.com/images/contenidos/files/23259058284.pdfIn PDF document text
- http://le-lemniscus-incandescent.fr/ckeditor/upload/files/sejapafugigifavenoji.pdfIn PDF document text
- http://fruitofthespiritcatering.com/clients/9/9e/9e5e3efd27976f294ade36eaf76108d7/File/49344038641.pdfIn PDF document text
- http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608385ec50ad1---6465107119.pdfIn PDF document text
- https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/db5b8799a6dc39136e9f66572cfb4ad5/buxafugepewin.pdfIn PDF document text
- http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781c84e1272---28468894814.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d353597564---povaw.pdfIn PDF document text
- https://corghialberti.it/file/7160059927.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/jikexozoxaxopozav.pdfIn PDF document text
- http://ig-einheitsloks.de/medien/file/niwap.pdfIn PDF document text
- http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/sitotipowasanunolu.pdfIn PDF document text
- http://sattamatkapatti.com/userfiles/file/4481218725.pdfIn PDF document text
- http://duquenne-moteurs.fr/webroot/upload/files/73869736770.pdfIn PDF document text
- https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/85cjf11pdd9m6j6kbmjk460m1q/saxip.pdfIn PDF document text
- http://vagtteam.com/userfiles/Files/rilanakuxamonexakatekaka.pdfIn PDF document text
- http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb5e1e1c3b---petenotudurimamev.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=ogbono+soup+with+okroPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eb15.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB15	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001032c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1032C	10636 bytes
SHA-256: `dcb3406b440e8ab98178b1da6c8b7dda0a81cc5fe3be97d0caff9f21ebb54e2f`
`font_02_sfnt_off00011b57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B57	17840 bytes
SHA-256: `5d40346fe1f32ef22d9f03e28cff4f147a2366e151ca4e0e636339c473c975bd`
`font_03_sfnt_off0001369f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1369F	17108 bytes
SHA-256: `b953dc23501fe9be9088ec7ddac6e6c455b4cdc9f12acc51cf51659c46962d4e`

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