PDF malware analysis — malicious · 1ea80d65c9edcd19

MALICIOUS

PDF

100.6 KB Created: 2021-04-21 02:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: bddedbce6f04924aa7503079fa333f83 SHA-1: a71c7f343ea605de26b5186c6bcf06dd271f52cc SHA-256: 1ea80d65c9edcd192a66fa89672cf3952a59a7cceb738eb5ff75fbfe5f5ce7b4

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous external links, many hosted on disposable domains, and a heuristic indicating it's a link farm. The presence of a 'download button' lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and external links are indicative of a malicious workflow, likely involving the download of a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://botokaw.ru/strik?utm_term=soundlogic+xt+instructions PDF link annotation
- http://vuzitofakomuj.22web.org/batman_the_dark_knight_in_tamilrockers.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405660/normal_600c64647059e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4456687/normal_5ff5b7c46ea46.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453907/normal_606cbee609ad7.pdfIn PDF document text
- http://expo-kit.ru/41134866585eda5y.pdfIn PDF document text
- https://dupevolorimix.weebly.com/uploads/1/3/4/5/134588768/08c41f.pdfIn PDF document text
- http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
- http://topcreditcheck.info/libro_de_historia_5_grado_2020_contestado1s4mp.pdfIn PDF document text
- http://1offpark.xyz/maus_book_1_quotesf8jfe.pdfIn PDF document text
- http://bbbbbbbbeeee.space/harris_jayaraj_songs_list345zo.pdfIn PDF document text
- http://mirror-x.org/verbos_regulares_en_ingles_en_presente_y_pasado_participioesdwv.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411717/normal_601ed600de19f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458634/normal_60666633d511e.pdfIn PDF document text
- https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/pitaxudakedijasubex.pdfIn PDF document text
- http://mebevevi.mywebcommunity.org/mobevux.pdfIn PDF document text
- http://povar2020.site/casting_crowns_former_membersro5jt.pdfIn PDF document text
- http://pixujuxe.mypressonline.com/64258830121.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://dubabin.rf.gd/36134849115.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_off00012211.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12211	4832 bytes
SHA-256: `8585b8e52a56157b657821a0e919f4b685406f68d3dddb70c30bc0c0fcc5a7d8`
`font_01_sfnt_off00013281.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13281	14016 bytes
SHA-256: `4572d75fab540e3e15506c45e26298342ccef3c47b8d0acdf71d051d95d495cd`
`font_02_sfnt_off000160d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x160D7	16060 bytes
SHA-256: `4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d`
`font_03_sfnt_off0001756f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1756F	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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