PDF malware analysis — malicious · 6d4b8b9385169c8b

MALICIOUS

PDF

83.7 KB Created: 2021-07-15 18:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 03e148c6e6ecad6e9472ea1a34a1c4df SHA-1: dd6dc47f9a8b1b7e6454efaaeba3821a0d6f2ac9 SHA-256: 6d4b8b9385169c8b43e191e57e516d641822105190837621d88158ee4fb7f3fb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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://smidgel.ru/uplcv?utm_term=ps+quick+selection+tool PDF link annotation
- https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/ed37bd97d0fb1c3df5f6f38989760429/gasedepalawu.pdfIn PDF document text
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a061697dd71---89686321660.pdfIn PDF document text
- https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/24364088814c58b45b0c8c53bc389cbc/3471423849.pdfIn PDF document text
- http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9d25baf19---gegibelurusegodumej.pdfIn PDF document text
- http://macabrey-luthier.fr/data/Files/88241180913.pdfIn PDF document text
- https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/7f7a6aaeef6ac6a165843fd266ce7a1b/rewuli.pdfIn PDF document text
- http://www.buildingmalawi.com/images/uploaded/documents/97365385062.pdfIn PDF document text
- http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16071987f3f63d---tesupoje.pdfIn PDF document text
- https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/o26v49en7qkei4v12ppo13ba0l/88148772328.pdfIn PDF document text
- https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160942ceca129c---58294911319.pdfIn PDF document text
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/8juq0nfbu97puf17v3njfn85u2/palasomikutimutakekuxepum.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/o60f167b9oggnittbiq9p3l6k1/vusipavidalaxoj.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b241502da2521d8fb8dbfa8f76ea22ab/16172534950.pdfIn PDF document text
- http://hongdanhaudio.com/luutru/files/misodopavuzigunud.pdfIn PDF document text
- http://stinpo.com/ckfinder/userfiles/files/sumuvoniwujew.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb86ae4070---51720672721.pdfIn PDF document text
- http://xn--9w3b11kh5l.com/ckupload/files/85888874510.pdfIn PDF document text
- http://graham1978.com/clients/79565/File/gebelifeve.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a88d3cb6a---zanuzumofonimibutuga.pdfIn PDF document text
- https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16079421908f45---gitelokuwofifonumi.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a07a7805261---makivaladomerojujupanafi.pdfIn PDF document text
- https://easybuildapp.com/files/uploaded/files/86245734248.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160788c392895f---xugerebegasuki.pdfIn PDF document text
- https://caribemed.com/userfiles/file/58723009445.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_off0000e612.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE612	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fe24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE24	17152 bytes
SHA-256: `e2c3fe2fa26e030f4b8bdb44bf60cd41775c20671435ed0de854c9e62e656ffd`
`font_02_sfnt_off00012a3f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A3F	10300 bytes
SHA-256: `825d742a5483b966e8f2f7cd5a70dcdde4837f633d06c5fafb759f2a0fc742e5`

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