PDF malware analysis — malicious · ddb9f6d815d9f51b

MALICIOUS

PDF

80.0 KB Created: 2021-10-07 07:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: d0f56316c210efdb7b6c21a8542802ae SHA-1: bae1a566c27c92544d1fe308c5b504be1b0f61cb SHA-256: ddb9f6d815d9f51b4b4a1b56822d5386a8e5e2bf28a68996c10b4fdf85ed46ca

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable or unknown hosting, characteristic of a link farm designed to distribute malicious content or phish users. The document body is unreadable, but the heuristic firings strongly indicate a malicious intent related to external resource redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 http://pate4me.com/userfiles/file/97662163331.pdf In PDF document text
- http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a369f3f2bb---movodo.pdfIn PDF document text
- http://matrix-corporation.com/upfiles/editor/files/83310842305.pdfIn PDF document text
- http://banglenhospital.com/UserFiles/File/sifuno.pdfIn PDF document text
- http://dailyxedayhang.com/userfiles/files/43889174263.pdfIn PDF document text
- http://samtekelektrik.com/files/97467573180.pdfIn PDF document text
- https://newsru.md/upload/userfiles/files/tododivita.pdfIn PDF document text
- https://milorem-service.ru/userfiles/file/99830710670.pdfIn PDF document text
- http://kccmaul.com/files/files/zumulosobuluvapim.pdfIn PDF document text
- http://abogarestudio.com/userfiles/file/84705445599.pdfIn PDF document text
- https://bbpartner.cz/userfiles/file/zokanabo.pdfIn PDF document text
- https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16149e285ad726---1065453246.pdfIn PDF document text
- http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/depaku.pdfIn PDF document text
- https://yuktogel.com/contents/files/diwiwig.pdfIn PDF document text
- https://rowanmkt.com/Uploads/ckfinder/userfiles/files/28942716236.pdfIn PDF document text
- http://www.beverburcht.nl/upload/files/lufefevisotiluv.pdfIn PDF document text
- http://homearcky.nl/userfiles/file/94282668934.pdfIn PDF document text
- http://www.hon-ro.hu/userfiles/files/36711402728.pdfIn PDF document text
- http://metapolar.hu/tmp/6515862401.pdfIn PDF document text
- http://logisticsnetworks.net/ckfinder/userfiles/files/31058254458.pdfIn PDF document text
- https://vieclamlaocai.vn/webroot/img/files/39692829129.pdfIn PDF document text
- http://projecthouse.bg/uploads/CKfinder/files/xuperipeduxujaz.pdfIn PDF document text
- https://silky.ae/images/bulk_images/files/51052265499.pdfIn PDF document text
- http://gzmzwl.com/Uploadfiles/files/69279186168.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=the+yachtsman+cape+codPDF link annotation
- 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_off0000cf8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF8A	19260 bytes
SHA-256: `96ec8b40916f022f9398c1174a0d134e6e33addaa587c84cb54098e4b9b7cbf7`
`font_01_sfnt_off00010209.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10209	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011a20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A20	10616 bytes
SHA-256: `703d65b7ad9525b2b933cd6e411122d296a484cecbced592919238e51e0fe610`

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