PDF malware analysis — malicious · aaefc3b0991579ff

MALICIOUS

PDF

92.1 KB Created: 2021-06-29 17:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 1d868690ec243cd73ead95963254e5bb SHA-1: 890a6bf06d0904a6a0a39cec1e95e205ab9e0ab4 SHA-256: aaefc3b0991579ff2f1b9cc265006f625e5860a0558b7bffcceb9da45efa5f98

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan indicate a high likelihood of malicious intent, possibly involving JavaScript execution or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://yaqeen-eg.com/userfiles/file/16492853788.pdf In PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/65e3f21dbcf406bcbae8aee3254e9766/6216029154.pdfIn PDF document text
- http://adabaskimerkezi.com/upload/file/dusepedemowinig.pdfIn PDF document text
- http://fixafilm.se/userfiles/file/47283369143.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/66d5a608edaf0a3917dabb5cc9765a5b/74927710743.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b076d872029---26874453206.pdfIn PDF document text
- https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/0k8n007luqlt8t1qc6fqf5cnu0/zakukit.pdfIn PDF document text
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/153b0351d6f08c4fdd5eefd9b7b19614/suvizorumibuvafedaw.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/4ebdqsgvnd44p6tt56nchs287m/43726945730.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/eec50b23b6690da40af3d5d1a1d80aa9/zajugavufavubok.pdfIn PDF document text
- http://degrossier.nl/uploads/file/92153482683.pdfIn PDF document text
- http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f08b64746f---30244907767.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160746fde5573a---ladiwejakonoraxirawo.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4bf3e954e---4899942984.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/e84caa7a77e67cdf06a86d2fed9e9806/kukobiwipewudejepavikuzew.pdfIn PDF document text
- http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/s9qcmee4r23g2fs8lselckuug9/3300322797.pdfIn PDF document text
- https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/t9795a01g0uaj499bufe1m0ktd/76997730139.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a318ba53cf6---pifilosukazutopogib.pdfIn PDF document text
- https://studiovizia.com/webroot/img/content/files/lagifijamate.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724ec0bc29a---sufosaz.pdfIn PDF document text
- https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/t6j30llql3f5mts42jbclijlci/68160456314.pdfIn PDF document text
- https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/08bm2gk4fsg35scl59k57v8oq3/97867388442.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=power+tower+roller+coasterPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010405.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10405	18284 bytes
SHA-256: `b1951592da5f8ecbb85d38f4acb1a1cf7673a72c57b1e6931b1b632c61d3543c`
`font_01_sfnt_off00013417.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13417	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014c2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14C2E	10116 bytes
SHA-256: `58c16872bdcf53bce5aaf39830ce38a100500c53bb87532f446a386d82959f2d`

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