PDF malware analysis — malicious · 29cb540c53339504

MALICIOUS

PDF

82.3 KB Created: 2021-09-13 00:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: 1fedaa09766fa99e4ef2b0328e0e1e6e SHA-1: a300b7547bdec6e6e338a478989db2a8bf8dece0 SHA-256: 29cb540c533395049f1ffe0e4e2e58d008fe09305642a94fb49ba9bfe665deed

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. The numerous external URLs, many on disposable domains, suggest a link farm designed to host or redirect to malicious payloads, aligning with the 'PDF_SEO_DISPOSABLE_LINK_FARM' finding. No scripts were extracted, but the PDF structure and URL patterns are indicative of malware distribution.

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 https://philabc.ru/uplcv?utm_term=wwe+2k20+for+android+ppsspp PDF link annotation
- https://haruhonpo.com/upload/haruhonpo/files/62614957050.pdfIn PDF document text
- https://5uempat.com/contents/files/17738061392.pdfIn PDF document text
- https://onderhoudnlgarantie.nl/upload/file/82525240694.pdfIn PDF document text
- http://yoshitomo-kokubunji.com/jcfiles/file/jazetowafolotibozarixi.pdfIn PDF document text
- https://sahyadrisevasanstha.in/userfiles/file/79842577453.pdfIn PDF document text
- http://sintjorisparochie.nl/userfiles/file/juwijajizevimi.pdfIn PDF document text
- http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/27412760843.pdfIn PDF document text
- http://savvyais.com/userfiles/file/39955218471.pdfIn PDF document text
- https://daks-96.com/f/uploads/files/11734602988.pdfIn PDF document text
- http://konditsionery-odincovo.ru/upload_picture/file/60719588224.pdfIn PDF document text
- http://cnex.cc/images/blog/file/63719935780.pdfIn PDF document text
- https://pjkconstruction.ca/images/file/47104997752.pdfIn PDF document text
- http://vitalchurchesinstitute.com/files/file/60841418045.pdfIn PDF document text
- http://foxhill101.com/userimages/kufeke.pdfIn PDF document text
- http://kaies.cn/upfiles/file/nuvedifanibug.pdfIn PDF document text
- http://ydyb.com/filespath/files/20210905124949.pdfIn PDF document text
- http://nhactheducthammy.com/upload/files/topitafuzajowo.pdfIn PDF document text
- http://gusanhightec.com/userData/board/file/53728194776.pdfIn PDF document text
- http://annabarons.lv/files/files/junagopigirari.pdfIn PDF document text
- http://ctm.it/userfiles/file/vebenelinojujisetojafiga.pdfIn PDF document text
- https://korvioinfotech.com/ckfinder/userfiles/files/23050875252.pdfIn PDF document text
- http://csigikes.hu/admin/fck_upload/file/wogidemewif.pdfIn PDF document text
- http://zap-interactive.com/uploads/files/vezogusijalupelikazos.pdfIn PDF document text
- https://immo-cjeanpaul.lu/userfiles/files/33044807616.pdfIn PDF document text
- https://knoxvilleremembers.com/media/kegotodom.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_off0000de71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE71	17008 bytes
SHA-256: `40f0a68cbd60e5dfe857aacad072120e9d53537ee5b9029b12027ad415135e1e`
`font_01_sfnt_off00010a8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A8F	10760 bytes
SHA-256: `534440581e2850d5bc7c65c15f3673315e1c991fd8a149f163de44592c16c4eb`
`font_02_sfnt_off00012387.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12387	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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