PDF malware analysis — malicious · 92f8edec3e5816bb

MALICIOUS

PDF

84.5 KB Created: 2021-04-06 13:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: af7ad70e99b793dc8be2d22d26fd08e4 SHA-1: 589b8cce1d8de7f2e6e732e3dfb04a44968a46f0 SHA-256: 92f8edec3e5816bbcffd582e21281b6e4b7bef0317d7904ec25a020d40c7c222

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of external URI heuristics and the sheer volume of links indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://mezovuduw.ru/wix?keyword=algebra+nation+section+5+topic+8+answers PDF link annotation
- http://opensol.xyz/inverse_trigonometric_formulas_list_class_12lg987.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386613/normal_6025650d1f414.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452373/normal_605f989868ed1.pdfIn PDF document text
- http://desokore.medianewsonline.com/harry_potter_and_the_philosophers_stone_film_length.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421460/normal_602dc95a62028.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404528/normal_605a75f617ea4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4527164/normal_60445af50dfea.pdfIn PDF document text
- http://tofugezupeb.mygamesonline.org/carcinomatosis_meningea.pdfIn PDF document text
- http://kedugobepuged.mywebcommunity.org/vozagumebavupeborufa.pdfIn PDF document text
- http://shothard.site/lumizobosodepidataxarofprr5g.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381347/normal_602dac45cba2e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501770/normal_5fd22f3689fbb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4456128/normal_5ff87ce36141b.pdfIn PDF document text
- http://gakmancreatures.ru/review_bluedio_v24ehs0.pdfIn PDF document text
- http://sivesesugipode.scienceontheweb.net/two_and_three_letter_words_in_english.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/fejififimaketo/92172941640.pdfIn PDF document text
- https://s3.amazonaws.com/zidosozawok/piwuwufelifikaraz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3df7d038-0097-484a-bf0f-29cf972393a3/1790312779.pdfIn PDF document text
- http://nizowozutagele.atwebpages.com/26825147899.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/99b77bd4-a433-4d68-a2ba-8c7c35e35a22/honda_generator_eu2000i_owners_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/01dad610-a8bf-4caa-85f2-54a88afc5d72/carry_on_wayward_son_neoni_karaoke.pdfIn PDF document text
- https://s3.amazonaws.com/purawuma/93725442593.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
- 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_off0000f3e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3E1	5640 bytes
SHA-256: `3dd8ceb8c329601bc47444d17a4a0d2a47d70a75c7b18825c42b84b09da2dfc0`
`font_01_sfnt_off00010737.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10737	11248 bytes
SHA-256: `730bb3f7f67b528bfb9d511bbb378e7df1ee72b1ec6e14330c6b13f7d0bd25b4`
`font_02_sfnt_off00012e22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E22	16240 bytes
SHA-256: `53106dfe31dafcfca83ab33623848b961ade03b5d556e9faaea0385e38f27a9c`

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