MALICIOUS
146
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it is a link farm and a callback phishing lure. The document body is heavily obfuscated, but the presence of external URIs and the 'SE_CALLBACK_LURE' heuristic strongly suggest a phishing or scam attempt where the user is prompted to call a number. No scripts were extracted, but the PDF structure and numerous embedded URLs point towards a malicious intent to redirect users to potentially harmful sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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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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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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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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 https://krisoc.ru/uplcv?utm_term=how+to+change+notification+sound+for+messenger+on+android PDF link annotation
- https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135cd70cb8ab---divuraridamowuk.pdfIn PDF document text
- https://altinhediyeler.com/calisma2/files/uploads/97263602670.pdfIn PDF document text
- http://deforma.it/userfiles/files/tajodujisudovifobi.pdfIn PDF document text
- http://brenderup.ro/mm/file/82009595776.pdfIn PDF document text
- http://realestatemiami.com/userfiles/files/56000330867.pdfIn PDF document text
- http://pensionpoint.cz/userfiles/files/buwakomojituxowezivabomag.pdfIn PDF document text
- http://leicesterbiketec.com/userfiles/file/20822561058.pdfIn PDF document text
- https://zapret-rf.org/web/img/podborky/files/lewawazeko.pdfIn PDF document text
- http://vimar.ua/userfiles/files/pamulanefazarax.pdfIn PDF document text
- http://sochi-polyana.com/ckfinder/userfiles/files/41998751809.pdfIn PDF document text
- https://adian.eus/files/galeria/files/70448034790.pdfIn PDF document text
- http://jsushibrea.com/uploads/files/56677941659.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/qernot102mj8u5b7eh3rk9nhf2/65705429249.pdfIn PDF document text
- http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/90239229347.pdfIn PDF document text
- http://badgerhillfarm.uk/69989098241.pdfIn PDF document text
- http://greddy.com/admin/common/ckfinder/userfiles/File/54476694434.pdfIn PDF document text
- http://blgjad.com/upload/files/29261752349.pdfIn PDF document text
- http://ecosdaliberdade.com/ckfinder/userfiles/files/xiwudijetemeku.pdfIn PDF document text
- http://asztalosweb.hu/userfiles/file/mitatevamukugivazuku.pdfIn PDF document text
- https://bhiringisamsankalimandir.org/userfiles/file/zoxalas.pdfIn PDF document text
- https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/sorosezuwaxodon.pdfIn PDF document text
- http://portaldeaquidauana.com.br/ckfinder/userfiles/files/xisesasu.pdfIn PDF document text
- https://thebottombillion.com/business_school/uploads/file/60442937377.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_off0000d74b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD74B | 17536 bytes |
SHA-256: 7a8411a54cf4dc204b8015021fc461b94c8517f327a9b893616e23f8a35dc773 |
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font_01_sfnt_off0001053a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1053A | 11052 bytes |
SHA-256: adea968428fcc529b58aba2de57b00635cb76e12f4f50dcaee842dab267b22f2 |
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font_02_sfnt_off00011ea1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11EA1 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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