PDF malware analysis — malicious · 7a484eeec1eb0fa2

MALICIOUS

PDF

91.1 KB Created: 2021-04-11 09:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 8c2fc8545095621541d1f22f6c7130b4 SHA-1: ed6012cd1244ffc9c555b25332e2840968c82f27 SHA-256: 7a484eeec1eb0fa221aabec5755709be1a6cb0b4539c9660dc8c793121b967ea

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a strong intent to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and dates, suggesting it was generated programmatically to host these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=what+is+book+12+of+the+odyssey+about PDF link annotation
- http://moxipafuxoxo.mygamesonline.org/cd4017_espaol.pdfIn PDF document text
- https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/90f103120e081.pdfIn PDF document text
- https://cdn.sqhk.co/sijoputolu/7ihjjii/thumper_girlfriend_plush.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420434/normal_5fc57d3c2df34.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446045/normal_5fc72a43d77be.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4407552/normal_5fe14e49cb583.pdfIn PDF document text
- https://cdn.sqhk.co/kiwametin/gbeieif/list_of_accusative_verbs.pdfIn PDF document text
- https://magajasomit.weebly.com/uploads/1/3/5/3/135388043/613138.pdfIn PDF document text
- https://natapoja.weebly.com/uploads/1/3/0/8/130813782/105935.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444110/normal_6017399e0e981.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450506/normal_603f936871ab4.pdfIn PDF document text
- http://fafuzum.sportsontheweb.net/nogilakuturijodesa.pdfIn PDF document text
- https://cdn.sqhk.co/kowaziwaso/oNeowWR/country_dial_codes_list.pdfIn PDF document text
- https://mafugefowodofo.weebly.com/uploads/1/3/1/3/131378796/kamaxekugujomenab.pdfIn PDF document text
- https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/kepokezedoruz-zavuzevivozum-divixanelogu-zowegigovabuzuf.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://lopakesuzuw.atwebpages.com/xafezigiwomebunagedida.pdfIn PDF document text
- http://bukezodebas.onlinewebshop.net/72075855968.pdfIn PDF document text
- http://bejanifezilo.atwebpages.com/42406086168.pdfIn PDF document text
- http://madepadejatutof.onlinewebshop.net/antibioticos_y_sus_familias.pdfIn PDF document text
- http://fozozip.onlinewebshop.net/abecedario_chino_mandarin.pdfIn PDF document text
- http://livirava.atwebpages.com/84709455435.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010568.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10568	5372 bytes
SHA-256: `c5d8ada2e60882f3ba245f051a8518701a702161be8e6bac84d618b105e6ad72`
`font_01_sfnt_off000117c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117C2	2252 bytes
SHA-256: `fcfb8f0e55ad9df5a1ad0726378e3a06894f11344b8aecece3a66ee94f149217`
`font_02_sfnt_off00012128.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12128	12016 bytes
SHA-256: `96494c94c55f58f969ef0b5a89253b012eb02b8f69b79374f72ee788407cb5c4`
`font_03_sfnt_off00014964.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14964	16144 bytes
SHA-256: `dae90044151951d95014dfa37ee5ca5b18c391261e54cbc8922fa8349ca3fc30`

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