PDF malware analysis — malicious · b30c64cb33642d9e

MALICIOUS

PDF

85.8 KB Created: 2021-06-09 02:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 1e92e7eb8124e643c4df8182fd1843ec SHA-1: 7bcb8c9ba1f522ed216c94023ac03a7f9b0abbd8 SHA-256: b30c64cb33642d9e0e4a82bacb12bf8e49c898e4cbb1f226940740b78f4d5703

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The heuristic 'SE_BROWSER_INSTALL_LURE' strongly suggests a social engineering attack designed to trick the user into installing unwanted software or granting malicious permissions. The embedded URLs, particularly those on disposable hosting, further support the phishing and malware distribution context.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://oniceh.ru/pbw?utm_term=universal+errorless+physics+pdf+free+download+2020 PDF link annotation
- https://nikudedixipapun.weebly.com/uploads/1/3/4/6/134692686/dexorosemis-xifefusejesi-serisoka.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4449996/normal_60b293507f65f.pdfIn PDF document text
- https://vifawadezak.weebly.com/uploads/1/3/4/8/134846548/2692e1a8764e859.pdfIn PDF document text
- https://wonimigapikil.weebly.com/uploads/1/3/7/5/137509794/gufalufo-rulinoxa-jewipapabutomon.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379046/normal_60248a2425481.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483103/normal_6041345da4299.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489415/normal_5fd251fc20573.pdfIn PDF document text
- https://zopatiselinijil.weebly.com/uploads/1/3/4/7/134758238/a019314.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413346/normal_601a6f62b5fda.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4419847/normal_5fcbc26b1c9e2.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://wotasaful.pbworks.com/f/speakout_intermediate_grammar_extra_answer_key.pdfIn PDF document text
- http://jopamedet.pbworks.com/w/file/fetch/144444552/bloons_td_5_free_ios.pdfIn PDF document text
- http://dejapitud.pbworks.com/f/60618369791.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9522b2b2-7a37-41b7-a186-e808f69cc950/82033445270.pdfIn PDF document text
- http://nagaxop.pbworks.com/w/file/fetch/144538914/51610120489.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/adfefe7f-4487-482f-8c64-df27f187864b/26998490066.pdfIn PDF document text
- http://jetipufagi.pbworks.com/w/file/fetch/144567843/how_much_was_james_best_worth_when_he_died.pdfIn PDF document text
- http://risoxef.pbworks.com/w/file/fetch/144465063/xidiposonizotudofoz.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://scripts.sil.org/OFLIn 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_off0000f80e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF80E	5764 bytes
SHA-256: `ef13107f637548b7715c6c38d7a9ffb8dd07497be060ed0c360c2a1716256c39`
`font_01_sfnt_off00010bcb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BCB	11744 bytes
SHA-256: `480fcd6a9782f01f1798c1a4be9426fbcf9067dcc26a746f973d580a938edfbb`
`font_02_sfnt_off00013441.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13441	16140 bytes
SHA-256: `1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d`

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