PDF malware analysis — malicious · ec1cab6c9e6b473f

MALICIOUS

PDF

68.8 KB Created: 2021-09-27 23:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 787eb1c9df8b028b4e20005162c91e15 SHA-1: aba852fe860ea932e2af04a9e963fd5d3de17b3a SHA-256: ec1cab6c9e6b473f79eab960de61a130aff7cd63415d29225bf12c7827da4435

114 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it's designed to redirect users to malicious websites. The 'PDF_IMAGE_LURE' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics suggest a phishing or link-farming scheme. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9959

Heuristics 7

Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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=watch+how+to+lose+a+guy+in+10+days+online+free+putlockers PDF link annotation
- http://iproperty.ae/userfiles/file/lopuvinagika.pdfIn PDF document text
- https://sportsht.com/userfiles/file/lasedabezolebozedo.pdfIn PDF document text
- http://inciboya.com/resimler/site/files/soropavisujititegone.pdfIn PDF document text
- http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/barigalifefawenul.pdfIn PDF document text
- https://misbahelmudii.org/ckfinder/userfiles/files/fodatibapiribiwuv.pdfIn PDF document text
- http://princeverma.in/uploads/files/jawubugudipisatavokufewe.pdfIn PDF document text
- http://bebelino.ru/userfiles/file/60898480855.pdfIn PDF document text
- http://intrinhgia.com/admin/webroot/upload/image/files/24684579465.pdfIn PDF document text
- http://constantemails.com/userfiles/file/1631242288jatufepapufivirusebex.pdfIn PDF document text
- http://pcserviszlin.cz/ckfinder/userfiles/files/31423672350.pdfIn PDF document text
- https://impeka.lt/components/com_mijoshop/opencart/image/data/files/nokokuvudisenulutefa.pdfIn PDF document text
- http://ecohost.ru/pics/images/file/rojabirebojexome.pdfIn PDF document text
- https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/zilorur.pdfIn PDF document text
- https://cfbadalona.net/ckdata/files/5398284825.pdfIn PDF document text
- http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/18736134692.pdfIn PDF document text
- http://wish-pharma.com/upload/files/8370829602.pdfIn PDF document text
- https://alamansyria.com/userfiles/file/20506391979.pdfIn PDF document text
- http://xhiehchin.com/Xhieh_News/_file/laroj.pdfIn PDF document text
- https://cqc-material.com/app/webroot/userfiles/files/fibegusadepagatigilo.pdfIn PDF document text
- http://tianlanlawyer.com/filespath/files/20210927141840.pdfIn PDF document text
- http://e-sheremet.com/img/veremafimidibes.pdfIn PDF document text
- http://clair-environnement.eu/catalogue_dynamique/file/13842401604.pdfIn PDF document text
- https://sadex.pl/fck/file/pezaxosesawafadawoti.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_off0000ac77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAC77	14404 bytes
SHA-256: `0667c8f1d91eb8b574db5bd13f21bda4d03d342511dbe52e908721ff788c5be2`
`font_01_sfnt_off0000d033.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD033	11460 bytes
SHA-256: `d1d02c16e85cc6d38be9f722fcbd78406e3d8102827b28eaaed8b11c3634396b`
`font_02_sfnt_off0000eb29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB29	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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