PDF malware analysis — malicious · 8aaffcb0d3a2c197

MALICIOUS

PDF

86.0 KB Created: 2021-09-13 20:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 5b406da31085c0533228f3a1594d5934 SHA-1: ecb2af2dbed07e0343524da36cb0f61ab162d450 SHA-256: 8aaffcb0d3a2c1971db1c4ef26936718035dee46af90ecf1c0e0b384ac499510

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to other PDF files hosted on disposable domains, a common tactic for distributing malware or conducting phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://coretry.ru/uplcv?utm_term=gta+5+download+free+for+mobile PDF link annotation
- http://mitcostruttori.it/userfiles/files/95782348060.pdfIn PDF document text
- http://otestmanager.org/club/data/userfiles/file/20210908143542.pdfIn PDF document text
- http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16131d2a20b6f1---nitinapapagolajawi.pdfIn PDF document text
- http://strandedtattoo.com/file/kapub.pdfIn PDF document text
- http://gps-tw.com/CKEdit/upload/files/10359180459.pdfIn PDF document text
- https://lbk-ingatlan.hu/uploads/file/dediro.pdfIn PDF document text
- https://bunyaminerdemir.com/resimler/files/66127960795.pdfIn PDF document text
- http://thanhlapcongtykiengiang.com/upload/ck/files/rokexile.pdfIn PDF document text
- https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/c718c0ebd16f81ba89ac8a0fb3d17cdd/57829465388.pdfIn PDF document text
- http://podhoru.cz/userfiles/file/fojerixexoz.pdfIn PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16136c4f78f57c---sakasazonixojokafixuwenu.pdfIn PDF document text
- https://almondzwealth.com/administrator/imagetemp/file/voneribarowejamirakala.pdfIn PDF document text
- https://defi128.phpascal.com/userfiles/files/waxopaledajakazepobipe.pdfIn PDF document text
- https://srmhomes.com/images/bulk_images/files/60907576155.pdfIn PDF document text
- https://camping-du-lac-dijon.com/userfiles/fichiers/53610807382.pdfIn PDF document text
- https://vanphongphampmc.com/upload/files/vemikidejikuvelilekapa.pdfIn PDF document text
- http://festacreativita.org/userfiles/file/sisigadewonoveboviw.pdfIn PDF document text
- http://molenat-energies.fr/molenat.com/images/editor/file/doxizironep.pdfIn PDF document text
- https://cantellodetersiviprofessionali.it/uploads/file/48549972020.pdfIn PDF document text
- http://p-jtech.com/userData/board/file/11617093333.pdfIn PDF document text
- http://veoguidecostarica.com/ci/userfiles/files/99671452411.pdfIn PDF document text
- https://aznamaste.com/ckfinder/userfiles/files/padevamewubedevezor.pdfIn PDF document text
- http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/35957007568.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://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_off0000ed01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED01	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010513.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10513	18424 bytes
SHA-256: `1a67c9d0e036c1bcd6010045c8670399192b921946b1dfde2ccae68f125f01a2`
`font_02_sfnt_off000134b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134B4	10744 bytes
SHA-256: `732cf7a03fc27243d338c611fbc3334e6dc40c5b5a1fd8e3d2f3944950e76c27`

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