MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is identified as a malicious PDF by multiple heuristics and a ClamAV detection. It contains numerous external links, with a high-confidence heuristic indicating a link to an algorithmically-generated URL, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.
Machine Learning
- Nyx PDF Classifier malicious score 0.9979
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://kechengchem.com/upload/files/gijejolemuwowek.pdf In PDF document text
- http://avesta-hmora.boj.se/uploads/userfiles/files/78744746459.pdfIn PDF document text
- https://indirimlipin.com/calisma2/files/uploads/59703922614.pdfIn PDF document text
- http://jeanthompson.nl/ckfinder/userfiles/files/pedidozuvaw.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161350fa709083---rarixewa.pdfIn PDF document text
- http://wonikquartz.com/upload/editor/file/1630916478.pdfIn PDF document text
- https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/30524859093.pdfIn PDF document text
- http://www.euro-fly.eu/userfiles/files/buvokenumedavilobemevo.pdfIn PDF document text
- https://aslimitada.com/userfiles/file/35434352299.pdfIn PDF document text
- https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/8012717892.pdfIn PDF document text
- http://ambulatorioveterinariobubiniregini.eu/userfiles/files/liverikedum.pdfIn PDF document text
- http://fotografieindex.nl/images/uploads/kadevupopijijebepimipa.pdfIn PDF document text
- http://ackerviewguesthouse.com/userfiles/file/31667342830.pdfIn PDF document text
- http://closehorses.com/userfiles/file/82989101665.pdfIn PDF document text
- http://rosg.net/sa_upload/userfiles/file/20210913164543.pdfIn PDF document text
- https://bakwanudang.com/contents/files/javusepuvax.pdfIn PDF document text
- http://status.cz/UserFiles/File/7391864405.pdfIn PDF document text
- http://birizgardenhotel.com/userfiles/file/42858301295.pdfIn PDF document text
- http://radekslodkiewicz.pl/files/file/vawigexerepovet.pdfIn PDF document text
- http://limeitec.com/upfiles/editor/files/1771273893.pdfIn PDF document text
- http://s-pack.kr/userfiles/file/20210914133610.pdfIn PDF document text
- http://klusjesindex.nl/images/uploads/17090565052.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=adb+shell+su+without+rootPDF 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_off0000f0c0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF0C0 | 17176 bytes |
SHA-256: c493971afa6cd019fab35fe77cab7f3c9d844f3c3d0fd8a2737e09033f2b7982 |
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font_01_sfnt_off00011dd6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11DD6 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000135ed.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x135ED | 10384 bytes |
SHA-256: c6e01ed0856f0ae8fa014c1cefa3c713ef48048be9b28767911ca1ab57fc1952 |
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