PDF malware analysis — malicious · 907c3f3837717053

MALICIOUS

PDF

68.6 KB Created: 2021-09-18 04:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 075ea4d3f10fbff651038e416cd53620 SHA-1: 388aef66097f0719573b71f8efe5831e3102ed9c SHA-256: 907c3f3837717053df3ac209365fc939c72404976b69ff820e1cf157c3d058ed

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing unwanted applications. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be a precursor to delivering a password-protected archive.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://drafthe.ru/uplcv?utm_term=hollywood+movie+download+app+apk PDF link annotation
- https://openkomm.yussfone-crm.com/userfiles/file/73142192257.pdfIn PDF document text
- http://nsmpublicschool.org/slbdavbatala/userfiles/file/4832220254.pdfIn PDF document text
- https://magicdiscoradio.com/userfiles/file/10866015762.pdfIn PDF document text
- http://architettodrabeni.it/userfiles/files/55425226864.pdfIn PDF document text
- http://sziszolg.hu/editor_up/barivewaxuwesazufifane.pdfIn PDF document text
- https://capital-publishing.com/ckfinder/userfiles/files/gefafafeledijejavitujef.pdfIn PDF document text
- http://bhartiyambeohari.in/userfiles/file/39968279575.pdfIn PDF document text
- https://barcelonamedicalcenter.com/files/galeria/files/24231165304.pdfIn PDF document text
- http://xn--3bsx3iw22bmot.com/filespath/files/20210910094833.pdfIn PDF document text
- http://okmarin.ru/userfiles/file/61132759023.pdfIn PDF document text
- https://udruga-invalida.hr/files/36093765784.pdfIn PDF document text
- https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd6c053c8b---poderasivozidamujajo.pdfIn PDF document text
- http://bestapp4u.com/admin/uploadedfiles/file/72747993497.pdfIn PDF document text
- https://absoluteanytime.com/media_file/files/files/48756299538.pdfIn PDF document text
- http://poaglasses.com/uploads/files/202109101915479000.pdfIn PDF document text
- http://degrossier.nl/uploads/file/57319788903.pdfIn PDF document text
- http://quaisetoiles.fr/img_pages/file/midubaxowezabatemuvixero.pdfIn PDF document text
- https://netcsemege.hu/ckfinder/userfiles/files/kejol.pdfIn PDF document text
- http://tubelessons.net/cms_images/file/67490151105.pdfIn PDF document text
- http://associatedreclaimed.com/userfiles/files/80970922509.pdfIn PDF document text
- http://fc-junajted.com/upload/datoteke/nivubalet.pdfIn PDF document text
- http://thrifty-uy.com/files/others/46228997091.pdfIn PDF document text
- http://rpsbchamber.org/editorData/file/61719408348.pdfIn PDF document text
- http://myslizdrave.com/soubory/bobakasomenobuxorivumim.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_off0000b0e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB0E7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c8f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8F9	14268 bytes
SHA-256: `f8b076a6df4833dcd9541c86cb19d55313c226adfe525ce52b8d701698f8e77d`
`font_02_sfnt_off0000ecb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECB1	10536 bytes
SHA-256: `6c7518211ef670a72de421debe06f0303b9b1216d6d06b834cde9000d53fc15c`

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