PDF malware analysis — malicious · 2ffad4f49011ecde

MALICIOUS

PDF

78.2 KB Created: 2021-03-30 01:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: b3e965cbf34bc5e06fd5855e2819c9e5 SHA-1: 53e7a590598f20ebaefb1e2e14c088e5919ed2b5 SHA-256: 2ffad4f49011ecde590c71fb61096a549158b6e9ad8179c19525077960009df1

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely leveraging social engineering to trick users into clicking on the malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://leonvi.ru/award?keyword=mcgraw+hill+ap+us+history+textbook+pdf PDF link annotation
- http://coolvdomaion.online/33559437569hjpo2.pdfIn PDF document text
- http://form-copyrightservices.com/nj_transit_bus_164_holiday_schedule_163avzin.pdfIn PDF document text
- http://fafuzum.sportsontheweb.net/84774011813.pdfIn PDF document text
- http://fudazozotakaxal.mywebcommunity.org/wafujaterodafutixujojin.pdfIn PDF document text
- http://womebaziwime.iblogger.org/57550329536.pdfIn PDF document text
- http://xevedudox.sportsontheweb.net/93138689077.pdfIn PDF document text
- http://giwudogor.scienceontheweb.net/67152816455.pdfIn PDF document text
- http://kinemulawaw.sportsontheweb.net/saxon_algebra_1_tests.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://sedopati.epizy.com/what_does_a_positive_enthalpy_mean.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/21af3162-71dc-49d5-9f30-ee6b81054354/best_swahili_english_dictionary_app.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3c14fab1-ca0e-4c3c-8148-67d56b1f8e5f/birthday_prayer_for_goddaughter.pdfIn PDF document text
- https://s3.amazonaws.com/miledu/84277385766.pdfIn PDF document text
- http://nodixuzotegiv.rf.gd/zikiworiv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/096c2da9-b9dd-4f72-a286-0b41f85c44a0/fuzofaruvetezarokaripoda.pdfIn PDF document text
- https://s3.amazonaws.com/fizaxo/25351652928.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f729331d-9573-4794-8de6-212453d33a93/62228716834.pdfIn PDF document text
- http://ruvedinaz.rf.gd/ocean_s_12_soundtrack.pdfIn PDF document text
- https://s3.amazonaws.com/gogonof/cdc_shingrix_vis.pdfIn PDF document text
- https://s3.amazonaws.com/widiku/pubojurujex.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3017eae9-6df6-43e0-8f30-0952f5c05f11/kozuxuvagesunamegasokom.pdfIn PDF document text
- https://s3.amazonaws.com/genijusemu/coliform_as_an_indicator_organism.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/53b403de-cdc2-44b3-a3de-b6bbe67ff72c/76557352014.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ad95be4a-b6ab-4de0-8d05-1f1270a1d20e/is_vicks_vaporizer_ok_for_babies.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cfe78519-4b2c-4664-a383-3e187f16f7f2/76530684026.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/50529262-e846-4381-9479-0e1b9f4ddc37/la_biblia_hablada_salmos_140.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f114.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF114	5888 bytes
SHA-256: `d888854557fb55e214ee78a99f2eb19a50e75ccc6e5b894077d10e3adb832551`
`font_01_sfnt_off0001053f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1053F	11096 bytes
SHA-256: `aa809d7971c5fa6f941c74c4ea57e6d14794d3f1f7696cd0b56dbcf1ac7c41d1`

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