PDF malware analysis — malicious · 772aa755c2fbc501

MALICIOUS

PDF

79.2 KB Created: 2021-09-02 04:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 655562b9028cb5a137e47b72f01dc77a SHA-1: 8ccc86f078c18e0892d86e4ddd4ee77205c21b69 SHA-256: 772aa755c2fbc501bc2bd0aeff329e3896128c67baddff94587f9893949a4c16

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to obscure the ultimate destination. No scripts were extracted, but the PDF structure and URL patterns suggest it's designed to lure users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://huntic.ru/uplcv?utm_term=the+columbian+exchange+negative+effects PDF link annotation
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd7a65eab5---jagagoganibizenegapi.pdfIn PDF document text
- https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5ec79da67---pebedovosumijaxasiwavip.pdfIn PDF document text
- http://shengnabei.com/uploadfile/file///2021061600555359.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5be87bf7d3---lafemo.pdfIn PDF document text
- https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/fbf567f3e5e102448674b60d70574df4/noxazadiduwomedadisudize.pdfIn PDF document text
- http://thaimassageboy.com/ckfinder/userfiles/files/nuvolelatorazazilusati.pdfIn PDF document text
- http://kiavysocina.cz/UserFiles/File/nabafelinaw.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098e2da808ba---18067106315.pdfIn PDF document text
- http://yas-center.ru/userfiles/file/29864393689.pdfIn PDF document text
- http://gokea.org/upload/editor/files/82642472474.pdfIn PDF document text
- http://dagmare.de/userfiles/file/jalevozagag.pdfIn PDF document text
- http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc2173ff45---17918652868.pdfIn PDF document text
- http://staractivecollection.com/resimler/site/files/nogoxizu.pdfIn PDF document text
- https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/1ba2a49njn8n3vg42qk8qg50l6/89431868256.pdfIn PDF document text
- https://www.sensiblemachines.com/ckfinder/core/connector/php/files/jexeparajugadukexi.pdfIn PDF document text
- http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6847a33d3c---69557517523.pdfIn PDF document text
- http://myshiou.com/uploads/files/202108220130255203.pdfIn PDF document text
- https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/1b69fc76aad53f624aeb321f15dbc0f2/darajugina.pdfIn PDF document text
- http://pazarziraat.com/userfiles/file/23759694180.pdfIn PDF document text
- https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/1418120d33ed09e1d8d0e2e72fabbc35/44505005717.pdfIn PDF document text
- https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/d71924a6af3d5d6970fd4910d2915e5d/zinitatejopatiwi.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c45dd55f9e0---paxitiruweboseletobisuz.pdfIn PDF document text
- http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079d8c1d8068---88400324485.pdfIn PDF document text
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/048502da7b31a266741f3784e87062e5/jivadewexe.pdfIn PDF document text
- https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/6e46947a4249f3b8c8fb88c06990d29b/vuritoja.pdfIn PDF document text
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/0c401cba87ecaa0cd158b1d2601335a8/wipogalelasejazip.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_off0000cd62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD62	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e574.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE574	18020 bytes
SHA-256: `93bc6df2409ba31cecc1eb9d9550e9e5d9acb4b81ecdf672ebb193b15463c50f`
`font_02_sfnt_off000113b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113B4	11056 bytes
SHA-256: `426f312b398d2d230f295c4b368dc023dd3cf9876bb75dc57c6185496ecb618c`

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