PDF malware analysis — malicious · 67e15036eda66898

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 07:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 11bc8fee94cc7f2fb5b612e2ee980f83 SHA-1: f1f81241a7210c08d35c7ac9f42913d9942afad9 SHA-256: 67e15036eda66898d58bccb119668f0981f75a113e52a685e41adcc80b78ddf3

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a password-protected archive lure. The embedded URLs point to various PDF files, suggesting a distribution mechanism for malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
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 http://xaydunglenguyen.vn/upload/files/c87aad.pdf In PDF document text
- https://fong-cai.com/upload/files/40184300579.pdfIn PDF document text
- http://cadelupo.it/userfiles/files/52804379075.pdfIn PDF document text
- http://ncteonline.com/userfiles/file/tigakadelimokupixuzuxovot.pdfIn PDF document text
- https://rallstarawards.us/nbloom/fckuploads/file/bigipud.pdfIn PDF document text
- https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/gikam.pdfIn PDF document text
- https://abouelhoulgroup.com/userfiles/files/masopomopozeji.pdfIn PDF document text
- http://ttworld.hu/uploads/content_files/files/dapisutegimunenalevofuw.pdfIn PDF document text
- http://mai-colle.jp/userfiles/file/bunujujoforajuzi.pdfIn PDF document text
- https://garraldaarquitectura.com/garralda_userfiles/files/59520425315.pdfIn PDF document text
- http://banglatalkies.com/dynamic-images/cms/file/kixugosiviwetolapo.pdfIn PDF document text
- http://schokofontaenen.de/idata/34439367219.pdfIn PDF document text
- http://g-shocktou.com/user_file/file/pifunopulaxegawajelojizi.pdfIn PDF document text
- https://botroul.be/uploads/lizezozagadif.pdfIn PDF document text
- http://pol2-simf.ru/userfiles/file/38729662215.pdfIn PDF document text
- https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/tezupilupofopux.pdfIn PDF document text
- https://bakotech.at/uploads/ckeditor/files/givekolozum.pdfIn PDF document text
- http://iproperty.ae/userfiles/file/10366595173.pdfIn PDF document text
- http://packamate.com/userfiles/watag.pdfIn PDF document text
- https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed5c2a8bdc---pitere.pdfIn PDF document text
- http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136958fbae3c---fevukizofufabenilu.pdfIn PDF document text
- https://pasarant0g3l-turbo-h1t.com/contents/files/wafegunonakirudujafozadu.pdfIn PDF document text
- http://www.puhito.hu/uploads/wefovubikofevo.pdfIn PDF document text
- http://dui-antidote.net/images/userfiles/file/kosibusage.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=mejores+aplicaciones+espia+androidPDF 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_off0000daa8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAA8	10532 bytes
SHA-256: `c2574fb43e6b2b93fb26a1fa52dcc67bdd6ad644255f70c071848334ba60f992`
`font_01_sfnt_off0000f2ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2AE	18708 bytes
SHA-256: `eb2fbdca4f035ec4d0efc834cf80cdd5f3b3959d7f36fd4382a8da5edad94e63`
`font_02_sfnt_off000122d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122D1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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