PDF malware analysis — malicious · aa73b2c9d8b4a332

MALICIOUS

PDF

82.0 KB Created: 2021-09-21 05:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 5782db5e9d2d88187689f78bb039a519 SHA-1: 8bf7db410ef8b84a7bdd3084f6427f0903e128f5 SHA-256: aa73b2c9d8b4a3326734b57a69288a510b9dbf5434492746717114d1f2855004

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics like PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

Heuristics 5

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.
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://garglob.ru/uplcv?utm_term=high+heel+homicide+online+watch PDF link annotation
- http://vouchertiket.com/airplane/ckeditor/uploads/files/gumovekexetelozabixozij.pdfIn PDF document text
- http://davidhammerstein.org/ckfinder/userfiles/files/54896841682.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/6aob7nhkj5eom1uqpe6233sroh/61953015318.pdfIn PDF document text
- http://udokutscher.de/gfx/userfiles/files/17490056208.pdfIn PDF document text
- https://ocw.tw/uploads/files/nobukofobabupit.pdfIn PDF document text
- http://4chan.ro/UserFiles/file/87419583030.pdfIn PDF document text
- https://vntdc.com/upload/fck/file/85319130876.pdfIn PDF document text
- https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/60519938161.pdfIn PDF document text
- http://leylasuren.com/images/userfiles/imagefile/63893022160.pdfIn PDF document text
- https://truckforceone.com/upload/editor/file/gatepodolawuzilotojimoj.pdfIn PDF document text
- http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/dobokisedolafubet.pdfIn PDF document text
- https://houstoncoinclub.org/FCKeditor/file/lopapodaxita.pdfIn PDF document text
- https://atlastoursntravels.com/userfiles/file/vibabixavipip.pdfIn PDF document text
- https://facades-et-traditions.com/actualites/file/7818177618.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/0d3c3b95aa3d01614bc09ca87256c4b7/92763358407.pdfIn PDF document text
- http://grafiport.com/userfiles/file/8894420547.pdfIn PDF document text
- http://ydtmuhendislik.com/ckfinder/userfiles/files/62769648984.pdfIn PDF document text
- http://chickendaylacrescenta.com/uploads/files/pikivigogolujagad.pdfIn PDF document text
- http://laboratoriodiprogettazione-ve.it/userfiles/files/43310689124.pdfIn PDF document text
- http://inbond-cn.com/userfiles/file/kajumisamowuxaremikem.pdfIn PDF document text
- https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/72636340014.pdfIn PDF document text
- http://praguynakorn.com/praguynakorn/picture/datapro/files/xedoboken.pdfIn PDF document text
- http://originalbau.hu/imagesfiles/29859023547.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_off0000dbbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBBB	10628 bytes
SHA-256: `1360908ea705bd23fc347cfcc525e2598d3aca623b2327ee155ef636fd556f68`
`font_01_sfnt_off0000f3a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3A3	17844 bytes
SHA-256: `4a4704c5f16f33b089ace529ae7893e222eadb85e3149fd13e00da65f79a1c5f`
`font_02_sfnt_off000121c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121C7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.